Tweetsii Taps Twitter Locations, Mashes-Up Gowalla and Foursquare in the Mix

As location-based apps proliferate, so does the need for umbrella services that can aggregate data from multiple networks. Tweetsii, which is being introduced at SXSW, is one such service that looks promising. The app exploits Twitter's location-tagged data stream to tell you who's Tweeting nearby, and it also ties in Gowalla and Foursquare data too.

The way Tweetsii's Web site explains the app is almost adorable: "Tweetsii connects people and places across networks. Tweetsii is breaking...