Not sure if anyone cares of not.. but today Riot released the Twisted Treeline (3v3) map into Matchmaking for League of Legends.

Quote Originally Posted by ByronicHero View Post
Well, faithful Runeterrans, your long wait is over! Today, you shall don your robes, grab your runebooks, and strike off to do battle for the Twisted Treeline! That's right, the beta for Twisted Treeline has come to a close. You and two of your allies will now be able to join the matchmaking queue to do battle on this ground-breaking 3v3 Field of Justice! The fate of Valoran is in your hands, summoners!

Watch the Twisted Treeline Launch Trailer!
It's way more competitive and action packed then Summoner's Rift is. The map is smaller and there are only 2 lanes so there is plenty of ganking going on.