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Virtual NYC Tour provides virtual tours of several NYC neighborhoods with a googlemapped route, description of and actual photos from every angle along the path.
Google Weather Maps allows you to view the current conditions in major cities on a map.
Beer Map is great if you are planning a road trip and love beer.
Yahoo Real Estate Map is another web based map that places listings and rentals on a map.

Watch Me Change has been around for a while, but I still get a kick out of it. The idea is to modify the virtual character look like yourself, dress them up, then send the link to someone special. The virtual version of you will then dance and slowly and disrobe. It’s made by the GAP so it’s not as dirty as it appears to be.