Ask YC: Where do superstar web UI/UX/IA specialists come from?

For me, finding (if not hiring) decent hackers is trivial. I went to a very technical school where 25% of the student body were computer science majors and I do quite a bit of open source development; those networks have a high density of back-end hackers, but very few folks who have the same aplomb with front-end work. My question is, what are the analogous networks for organically meeting truly excellent web UI people? To be clear, I don't mean people who can "design a web page," but rather people who have the skillset to design and implement innovative, highly usable web app front-ends.