I'll admit that my situation isn't universal - luckily, I could get my foot in the door with many startups by being in the last batch of Hacker School - but if you, like me, hate academia and want to get to work, don't let your age stop you. Sure, there's companies that care about your schooling - the Googles, Twitters, Facebooks, and Palantirs of the world - but there are so many more that just want great hackers with awesome GitHub profiles and real-world chops.
(and, of course, make sure to never stop learning on your own time! You will, inevitably, have gaps in your knowledge you missed from school, but between Coursera, the availability of free textbooks and lectures, and other resources, it's not hard to remedy that on your own)