Hey Chris, as a startup cofounder who's into the tech scene, you should check out Tech in Motion. We have a meetup on Thursday night that's a drinks, demos & networking event: http://www.meetup.com/TechinMotionPhi... would be great to meet you!
PhillyCocoa is a Philadelphia area Mac and iPhone programming group, a chapter of the worldwide CocoaHeads. All skill levels are welcome. The only requirement is an interest in Apple-related technologies and moderate tolerance for geeking out.