See where eBay items are located using Visual eBay
This mashup pinpoints the exact locations that auctions are taking place in. Search for a keyword under a category and choose either the U.S., Canada, Australia or England, and Visual eBay pinpoints the locations on a Google Map. There is also a Google Gadget for Visual eBay that can be placed on your iGoogle homepage.
Visual eBay seemed to be a little buggy for us when trying it out.