Fancier conferences put up two projectors to let the audience see the slides. But the presenters still look at their slides on a notebook on the podium, or in some cases on a monitor on the floor below their stage.

How about adding a projector that projects on the back wall, just above the heads of the audience, for the speaker to see their own slides? Then they can roam the stage and see the slides without losing eye contact with the audience. They may not be able to see clear detail on the slides but they shouldn't need it.

I just went through a hellish weekend at the hands of United Airlines, trying to change planes at Dulles on Saturday, and not getting to California until Monday. I wasn't alone, and while I do wish to vent at the airline, there are things that could have been better with a bit of new thinking.

As flights were canceled or delayed, and planes filled up, for most customers the only answer was the customer service centers inside the terminals. These quickly had lines of hundreds of people with waits of several hours. In some cases, just for simple transactions like getting a hotel voucher because you had been moved to the next day. (While it is possible to get such vouchers at the ticketing desks outside the secure area, Dulles is not an easy airport to move around, and people were reluctant to take the shuttles to the master terminal and leave the secure area without knowing their fate.)

Among the many things the airline is to be faulted for is having no real way to deal with the huge numbers of customers who need service when a cascading problem occurs. Multi-hour waits simply don't cut it. The answer lies in extending the facilities of the self-service kiosks. At those kiosks you can do basic check-in, changes of seating and some other minor changes. You go up, put in your card or confirmation number, and you can do some transactions. You can also pick up the phone and talk to an agent sitting in their Nova Scotia call center. The kiosk has a printer that can print boarding passes. Unfortunately the agents are not empowered to do more than help you with what the kiosk can do. They can't be like the other customer service agents and rebook flights or issue vouchers.

When you have a big company like an airline, that may suddenly need hundreds of agents for one trouble spot, video kiosks with printers (and scanners) seem like a great idea. Stations could be installed where customers can come and talk to an agent by videocall. They can feed documents into scanners or show them to the camera. They can feed documents into hoppers that will destroy them if that's needed. And a more full printer could print them any documents they need -- boarding passes, tickets, hotel, food and transportation vouchers. In fact, unless agents have to physically handle luggage or control who gets on a plane, they don't need to be right there at all.

Of course this is not as personal as a live human in front of you. But it's much better than a phone agent (and lots of listening to Rhapsody in Blue.) And, if the need arises, you can suddenly have 100 agents serving a problem area instead of 5, and focus the on-site agents on on-site problems.

Of course, the scanners and printers are only needed at rare intervals during the transactions, so another approach would be to let people have a combined web/videocall experience on any laptop computer, and to contract with the providers of airport wifi service to make access to the airline's support website a free feature. Do that and suddenly there can be a thousand customer service videoconference tools in an airport that needs one. (They can all show video, and a growing number of laptops can also send it.) A smaller bank of scanners and printers can handle the portions of the transaction that need that. For example, you contact customer service on the laptop and the agent tells you to line up at scanner #5 and scan your documents. Then you work out your problems, and the agent tells you to go to printer #3 and get your new documents. (Destruction of old documents can be handled by the machine or possibly an on-site agent who does little but that.)

In fact, a lot of the stuff done at airport gates could be done this way. All the hassling at the desk is easy to do remotely. Only the actual ushering onto the planes needs live people. It may be less personal but I would rather have this than standing in line for long periods. They key factor is the ability to move agents around to where they are needed in an instant, so that there is no waiting (and little wasted time by agents.)

Of course, agents can also be very far away. Though I would resist the temptation to make them too far away (like India.) Not that there aren't good workers in India but too many companies fall for the temptation to get employees in India that are even cheaper than the good ones, and simply not up to the jobs they are given. The Nova Scotia crew were helpful and their distance was not a problem.

This principle can apply to conference and tradeshow registration as well. Why fly in staff to a remote tradeshow to do such jobs which tend to be quite bursty. Have local staff to man scanners and printers, and remote staff to talk on the videophone and solve my problems. It's so much cheaper than the cost of transporting and housing staff.

Of course, you can also just plain have a good internet/web customer service center. But I'm talking here about the problem of people who are at your facility, and deserve more than that. They need a live person to solve their problems, they need to combine what they can do on the computer with what a skilled (and authorized) agent can make happen, and because they are on location and upset, and not just at home on the computer, they deserve the expense of a bit more money to provide good service.

I wrote before about how the fancy bags they give away at conferences very rarely get used. I have a stack in the closet, and I'm not going to use them as my bag with sponsor logos plastered all over them. The people who attend such conferences aren't the sort who want to carry your advertising everywhere, or scream out "I'm so cheap I'm using a sponsored bag." And you can't give them to friends as gifts, even if they are nice bags. So I suggested that they put logos on the inside but of course that doesn't yet happen.

I'm not sure why, but beaming business cards between PDAs never caught on as much as I would have liked. Of course Palm and Wince PDAs don't speak the same beaming language (of course) and I never saw it much in Windows anyway.

With my new fancy scanner, I can scan a stack of 60 business cards in a minute, so it's not going to take me long to do the physical scanning. Business card scanning has been around for a while, but it still presents challenges.

There's a lot of equipment you don't need to have for long. And in some cases, the answer is to rent that equipment, but only a small subset of stuff is available for rental, especially at a good price.

So one alternative is what I would call a "ReBay" -- buy something used, typically via eBay, and then after done with it, sell it there again. In an efficient market, this costs only the depreciation on the unit, along with shipping and transaction fees. Unlike a rental, there is little time cost other than depreciation.

A lot of people want to catalog their extensive libraries, to be able to know what they have, to find books and even to join social sites which match you with people with similar book tastes, or even trade books with folks.

As workers search for trapped miners in Utah, having drilled a 9" hole down to what is hoped to be their area, they plan to use things like sound and detecting CO2 and O2 in the atmosphere to find the miners.

The radio had a tribute to Bob Barker, who retires today after 35 years hosting The Price is Right. I always admired the genius of that show in making product placement an essential part of the show -- the show was about the advertisers and made the audience think about how much the product was worth and remember it. I'm surprised we didn't see more copycat game shows. There's plenty of product placement today, but it's largely gratuitous, not integral as this was. The fans on the radio said that while the show was gone, they could always watch reruns.

Everybody's been discovering things in Google Street View. While Microsoft and Amazon did this sort of thing much earlier, there's been a lot more publicity about Google doing it because it's Google, and it's much more high resolution among other things.

But now that it's out, I expect we'll see web sites pop up where people spot the Google camera-car and report on its location in real time. Allowing people to prepare for its passage.

I expect we'll see:

At our new favourite Indian buffet (Cafe Bombay) they run Bollywood videos on big screens all the time. In Bollywood, as you probably know, everybody is dancing all the time, in wonderful synchronization, like Broadway but far more. I've never been to an Indian dance club to see if people try to do that in real life, but I suspect they want to.

I started musing about a future where brain implants let you give a computer control of your limbs so you could participate in such types of dance, but I realized we might be able to do something much sooner.

Many people accumulate a lot of frequent flyer miles they will never use. Some of the airlines allow you to donate miles to a very limited set of charities. I can see why they limit it -- they would much rather have you not use the miles than have the charity use them. Though it's possible that while the donor does not get any tax credit for donated miles, the airline does.

My father was famously a preacher turned agnostic. We used to argue all the time about the difference between an agnostic and an athiest. I felt the difference was inconsequential, he felt it was important. And I've had the same argument with other proclaimed agnostics. I found an amusing way to sum up my view of it in one answer.

What is the difference between an atheist and an agnostic?

The difference is the atheist says she's an atheist, while the agnostic says she's an agnostic.

When I watch the boundless energy of young children, and their parents' frustration over it, I wonder how high-tech will alter how children are raised in the next few decades. Of course already TV, and now computers play a large role, and it seems very few toys don't talk or move on their own.

But I've also realized that children, both from a sense of play and due to youthful simplicity, will tolerate some technologies far before adults will. For example, making an AI to pass the Turing Test for children may be much, much simpler than making one that can fool an adult. As such, we may start to see simple AIs meant for interacting with, occupying the minds of and educating children long before we find them usable as adults.

Another technology that young children might well tolerate sooner is virtual reality. We might hate the cartoonish graphics and un-natural interfaces of today's VRs but children don't know the interfaces aren't natural -- they will learn any interface -- and they love cartoon worlds.

Lots of people love model airplanes, and I bet they would love to simulate dogfights. They can't fire actual projectiles, as that would be dangerous, expensive, unworkable due to the weight and actually damage planes.

I wrote earlier about the bluetooth vibrator watch. I pushed this in part to promote the idea that phones should (almost) never ring. That ringing is rude to others and violates your own privacy, too.

Most of us, when we travel, put appointments we will have while on the road into our calendars. And we usually enter them in local time. ie. if I have a 1pm appointment in New York, I set it for 1pm not 10am in my Pacific home time zone. While some calendar programs let you specify the time zone for an event, most people don't, and many people also don't change the time zone when they cross a border, at least not right away.

At various times I have been part of dinner groups that meet once a month or once a week at either the same restaurant or a different restaurant every time. There's usually no special arrangement, but it's usually good for the restaurant since they get a big crowd on a slow night.

Last week, I wrote about new ideas for finding the lost. One I've done some follow-up on is the cell phone approach. While it's not hard to design a good emergency rescue radio if you are going to explicitly carry a rescue device when you get lost, the key to cell phones is that people are already carrying them without thinking about it -- even when going places with no cell reception since they want the phone with them when they return to reception.

There is a story that Ikonos is going to redirect a satellite to do a high-res shot of the area where CNet editor James Kim is missing in Oregon. That's good, though sadly, too late, but they also report not knowing what to do with the data.

Ok, this is a silly idea, but it would make a great baby shower gift. Crib sheets -- which is to say sheets to go on a baby's bed -- printed with small notes on your favourite subjects of choice -- math, physics, history, as you would need for taking an exam. And who knows, maybe you can pretend if the baby sleeps surrounded by Maxwell's equations she'll become a genius.