ConcertIn, built by past TechCrunch Meet-up pitch contest winner Jan Horna, essentially turns concerts into Facebook events, allowing you and your friends to talk up the Freelance Whales as well as buy tickets to their next concert.
The service doesn’t look like much on the surface but this “event” featuring the boy band Baby Lala shows you how it works. You create a concert event, buy tickets via BandsInTown’s API, and then discuss the concert with your friends. Short and sweet.
While I’m not totally convinced as to the utility of the service within Facebook, I’m sure it’s a great way to spread news about your favorite bands. Plus it’s one of the first Facebook apps I’ve seen that offers some utility besides keeping Farmville addicts out of the gene pool.