I was one of the 5,000 participants in the Grand Rapids Lipdub Project. I can't speak for everyone, but from what I saw, everyone had a great time making some cool art while promoting our city, too. It's been pretty interesting to see this video go viral, getting mentions in Newsweek (of course), NPR, Roger Ebert's Journal, supposedly a segment on the Today Show, and lots of others I'm sure.

My screen time was about 5 seconds starting about 2:15 as a pillowfighter. Go GR!