Crazy App of the Day: Foursquare, Friend-Finder, City Guide, Twitter with Benefits?

foursquare.190.jpgFoursquare is mobile friend finder, meet n' great game by the creator of DodgeBall, Dennis Crowley.  DodgeBall was sold in 2005 to Google. Foursquare works as an iPhone app, via text or the mobile web.  It's kind of like, Twitter with benefits.

Members create a network of friends in the service.  When friends arrive at a nightclub or other social hotspot, they "check in" to Foursquare via a text message, mobile web or the iPhone
application. In other words, the way Foursquare puts it, "tell us where you are and we'll tell your friends where to find you".

Members earn points and badges. Frequent attendees to certain night spots get to be the mayor of the joint.  Currently, Foursquare is  available in Austin, Chicago, Los Angeles, New York and San Francisco.
The Foursquare website explains what they want this way:

"+ Think "urban mix tape". We made a
little system that allows you to track all the cool things to do in NYC
- both the things you've done (your "Top 12") and the things you want
to do (your "To Do" list).



+ We're not looking for reviews here... Think less "the food here is top notch!" and more "Go here, do this" or "Eat here, order this"
(for example: "Go to Dumont Burger, order the Mac and Cheese").
Remember, you've only got 12 slots, so fill 'em with the 12 coolest
things you can think of in NYC.
"