Written in ruby, with the help of the following great technologies (most are ruby gems):

 - ramaze, the simple, modular web-framework (ramaze.net)
 - sequel as the database ORM layer (http://code.google.com/p/ruby-sequel/wiki/CheatSheet)
 - mongrel as the webserver (monkey patched with swiftiply to use eventmachine: http://swiftiply.swiftcore.org/mongrel.html)
 - facebooker for facebook api calls (http://chadfowler.com/2007/9/5/writing-apis-to-wrap-apis)
 - haml for html templating (http://haml.hamptoncatlin.com/)
 - sass for css templating (http://haml.hamptoncatlin.com/docs/sass)
 - analogger for logging (http://analogger.swiftcore.org/)
 - postgres for db backend (and sqlite for dev)