By the way, I realized that I never said “good on you” to Yahoo! for their Open Hack Day. Just before Open Hack Day, Yahoo! also launched BBAuth. Using BBAuth, web users can authenticate to an application using their Yahoo! user id. If that sounds neat, Google offers something similar called Google Account Authentication that you might want to check out.
Anyway, I just wanted to make sure that I told Yahoo! congrats. Any time you see this level of enthusiasm, it was clearly a very cool event, and it sounds like the attendees had a really good time.