Back in November of last year, the location-based social event service Hot Potato launched at our Realtime CrunchUp.
When I wrote that location would be this year’s Twitter at SXSW, I also meant that Twitter’s geolocation would be this year’s Twitter at SXSW.
When Plancast launched last November, it immediately put other sites like Upcoming, Dopplr, and every single e-vite service on notice.
