Rafe Needleman, who contributes to the excellent Webware blog from cnet.com, recently posted a review about a new Web 2.0 mashup site called FindNearby.net.
In a nutshell, the site mashes up Google Maps, Amazon, eBay, Craiglist, and WalMart.com. Once you enter in your location and an item you are looking to purchase, the site locates the items for sale that are nearby. A cool feature is the color coding of pins on the map that identifies whether the item is being auctioned off, sold at a retail store, or put up for sale by a private party.
There are also a number of related "spinoff" sites including wii.findnearby.net (image above) and ps3.findnearby.net to search for game consoles, and new ones on the horizon including datesnearby.net.
Now, all that's needed is some click-to-talk and other real-time communications functionality to put the proverbial cherry on the sundae! Highly recommended!