Google Maps Mania
So Google MAPS which is a free web-based mapping system (much better and more powerful than mapquest or the like) has recently released the APIs, which allow anyone to create new and interesting uses for the mapping system, like Craig's List real-estate maps or Free Wifi maps. Heres a great website that is trying to follow all the different projects that have spawned from this new power. Hope you enjoy it!
Google Maps MANIA