It's the end of an era for one of iOS' biggest ventures -- OpenFeint has hired a new CEO, Naoki Aoyagi, which means company founder Jason Citron is leaving the company to head elsewhere.
OpenFeint, you'll remember, has its roots in an iPhone game called Aurora Feint, which Citron developed a few years ago with co-founder Danielle Cassley (who left the company fairly early on). After that early title saw some success, the venture was transformed instead into a free platform for developers to share friends' list
