Here is the URL:

http://www.inetfeedback.com/ebay

This free, web based tool allows you to find and view negative, neutral, and withdrawn eBay feedback for any eBay user in the world. The tool is web based and requires you to install NO software on your computer, simply enter the URL in any browser and search for the user in question. Additionally the tool is written by a member of eBay's developer program and uses eBay's official API's to retrieve the feedback. This ensures that you are getting the correct and official eBay feedback. If you don't see the "right now on eBay" logo on a tool you are using, then it's not written by a member of eBay's development community!