http://www.gamrs.net is hosting a 5v5 League of Legends tournament, its free to enter, and here are the prizes for the winners:
1st place team: Each member will receive a $50 Riot Points Card (Code will be sent)
2nd place team: Each member will receive a $25 Riot Points Card (Code will be sent)
3rd place team: Each member will receive $5 Gamrs Credits for any future tournaments

   The rules for the tournaments are located on the tournaments bracket page, when registering for this tournament make sure your team and one alternate is registered on the site and is on your roster, members who are not on the team roster will not be able to participate.
(alternates are not required, but last minute alternates during the tournament is not allowed.)
Also add your League of Legends id to your profile on Gamrs.