It's part Foursquare, part Fanpulse and part ESPN / vintage InGameNow:
Foursquare has teamed up with the NBA to award Celtics and Lakers badges to fans who 'check in' tonight and shout either "Go Lakers" or "Go Celtics". It is different than your typical Foursquare 'check in' in that it is determined by content rather than location... but it will clearly be a big driver of traffic and usage. And clearly the NBA is getting behind the relationship: in 53 seconds, 186 Facebook users commented on the badges and 163 others liked it.
