Enemy Down are the biggest UK gaming league website and now they are branching out into console territory:

Today, Enemy Down is taking a momentous step in online gaming, increasing our already impressive online gaming league to branch out into the console gaming scene. A first for our established league system to provide a place where both console and PC gamers can unite and play together. We will be picking up and supporting leagues for Activision’s Call of Duty 4 for the Xbox 360, having already created successful leagues and events for the game’s massive PC counterpart.

Good luck expanding your website and I look forward to seeing how it all pans out.