Blood Bowl is by far the best game ever created by GW. However, only needing 16 models to field a full roster is not very profitable for GW, so the game relies upon support from many independent groups. I happen to play with the AGBBL, the Adventurer's Guild Blood Bowl League, based in Harrisburg, PA.
The AGBBL holds 3-4 leagues a year, hosts 2-4 tournaments a year, and travels to various tournaments on the circuit. An excellent group of folk if ever you want to learn about this crazy and fun game.