Geomeme is a great solution that thends local events in real time using Twitter. It´s a solution that uses the Twitter geolocation API to track the events. Geomeme gives you the last trends on Twitter and informs you the place where the trend come from.
Venture Slogan: What’s happening where?
Geomeme´s own description: “…GeoMeme is the fun way to measure and share real-time local twitter trends. I got thinking about this when a recent Los Angeles earthquake was being measured in tweets per second rather than using the Richter Scale…”