Platform Allows Sharing of Alerts and Places in Location-Aware Group - While GeoGroups does leverage location-based networking like a FourSquare, it offers a completely new twist on the paradigm - it's not just venue-based and users can create private (or public) groups. It also uses the iPhone's push technology so that for instance, you could be notified when a co-worker gets to (or leaves work) or when a child gets to school.