To make it even more spicy, according to wikipedia, Gowalla actually launched 2 years prior to foursquare[1]. Dodgeball was founded in 2000. [1]The article say

To make it even more spicy, according to wikipedia, Gowalla actually launched 2 years prior to foursquare[1]. Dodgeball was founded in 2000. [1]The article says 2009, wikipedia says 2007?