It might have been better as a more generic "Ask HN: Who's hiring interns?" thread. But, nothing against the rules about this sort of post (not to mention that there's always the "Ask HN: Who's Hiring <redux>" threads that pop up every few weeks).
My suggestion to anyone looking for an internship is to find a company you're interested in, look on their jobs page and see if they have anything open in your area. And then send them an email (even if the listing isn't for an internship specifically). The worst that can happen is that someone replies and says "Sorry, we're not looking for an intern right now."
And hey, it worked for me; I've got a very awesome internship at Justin.tv this summer by doing the above.