What are your primary skills and/or areas to hack on? (e.g. front-end, back-end, UX, UI, hardware, graphics, etc.)
backend/frontend, web app design
What's something cool you've built recently? (it's okay if you haven't)
signon.org (well, helped build ;-))
If you've been to hackathons in the past, what was the best you've ever been to?
Sports Hack Day Seattle -- very fun.