Location Wars at SXSW
Speaks for itself. It's a little long (i.e. you get the point pretty quickly), but if SXSW was intended to be the one of the early, important skirmishes of the nascent location wars, this is how Foursquare fared against Gowalla, Twitter, Flickr and a few others. Incidentally, Foursquare is widely believed to have been the victor. It's still early though.
