Rainert was a seed investor in the location based social network, and has been working part time with the team over the past two months on product development. Of course, this is also a reunion between Rainert and Foursquare CEO and co-founder Dennis Crowley. They both founded Dodgeball together. The location based service was acquired by Google in May of 2005. Rainert and Crowley subsequently left Google. Dodgeball was shut down buy Google in January of last year.
Rainert has been running his own product development consultancy, Tinker Studio. According to Rainert’s post, he’s wrapping projects and will not take on any new jobs for now. He alluded to some new features he’s working on with Foursquare, so it should be interesting to see what the startup has up its sleeve.