I asked this very same question a few months ago. Websites like OLMIS say you need a bachelor's, but the real world suggests otherwise. I'm taking a computer careers class right now, and we just had a guest speaker (a programmer) this week that said about the only place locally (in Oregon) that doesn't hire with an associate's is the city, but the next city over hires with just the 2 year.
The class I've been taking also says that unemployment for programmers is extremely low. In fact the guest speaker said you don't even have to be a great programmer to get a job, you just have to be decent. Obviously, because you live in the Silicon Valley, you may have a tougher job seeking field. Our guest speaker said that locally we can expect to be making $100,000 a year in 5 years with a 2 year degree and hard work.