World's Pick 'em

Is anyone else doing the Pick 'Em thing for the group/knock out stage winners? I am just curious about people's experience with them. I have been doing it and doing well, though I am a little sad there is nothing meaningful attached to it like a summoner icon or something. I didn't really give this much thought until I started doing well. I am currently at the "Baron Nashor" rank. Even a blind squirrel finds a nut I suppose.