[jasonshen]

You'll learn tons if you work at a even half-way decent startup, more at a good one - and there are plenty of those in the Bay Area. Might want to start here: http://www.quora.com/Which-startups-in-San-Francisco-Bay-Are... and even here: http://www.quora.com/Which-startups-are-hiring-in-the-San-Fr... - as any startup that wants full-time folks wouldn't mind getting free labor as well.

Obviously I'm going to suggest isocket (http://isocket.com) - where I work now. Lots of opportunities to do great work here.