Thanks everyone for retweeting, blogging, etc.
I got over 100 applications in less than 12 hours - I think that is enough to be going on with. I'll certainly re-post if I don't find a match in this batch, or when there is another opening. If you are still working on your app, go ahead and send it in - I'll look at all of them starting tomorrow.
Meanwhile, if you missed this opportunity, you might try looking here for internships in both agencies and publishing houses. And if you are in the San Diego area, I know that my subrights agent Taryn is also looking for an intern (in-office), and she would be an amazing person to learn from.