You may not have caught wind of this cool mashup that was rolled out for SXSW in Austin, Texas. The app, vicarious.ly shows real-time twitter locations on a map of people checking in via GoWalla and foursquare.. awesome!
The app was developed by boulder-based location-tech Start-up, SimpleGeo (@simpleGeo or Simplegeo.com) – the service was covered by TechCrunch recently.