Discussing based site as long as its about any place in the world. For example, plot your local school and tell everyone what you think of it. Plot your local bar and discuss its beer prices.
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RFacebook Ruby Gem
Tutorial for a IP to geolocation aggregator script
Jon Udell Google Maps Screencast
Google Maps Hacking and Bookmarklets
Detailed Google Maps API Tutorial
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.