I hadn't been over to Meetup, the web site that "organizes local interest groups," in a while. So when I visited last night, I was astounded by a statistic I saw on the front page. Meetup has 779,451 users (as of this writing) and the National Dean in 2004 Meetup Day has 135,378 members, far and away the largest Meetup group. Which means that roughly 17.4% — nearly 1 in 5 — Meetupers are signed up for Dean meetups. That's incredible, and totally cool.