Via Catalyst Digital via The Basketball Jones via an NBA press release yesterday:

NBA Digital today announced the launch of NBA Turnstile, the first professional sports multiplatform check-in application that will reward fans for attending and watching live games, and connect them to social media platforms such as Foursquare, Gowalla, Twitter, Facebook, and Fanvibe through the league’s digital products.

The beauty of the app, as Catalyst points out, is that it not only marries the on and offline social experiences, but maximizes exposure by aligning itself with already established platforms.