As the poster and the title say, there is a DOTA 2 Amateur tournament!
The goal of the tournament is to showcase the talent in the lower brackets of DOTA 2 and to promote the DOTA 2 community! So sign up if you have a team and want to participate, sign-ups are free and there are no limits. There are some rules on the forum of MishMash though, register on their website to sign up for the tournament and to view the rules! The website is: http://mishmashcommunity.com/
Don't miss out on MishMashCommunity's first DOTA 2 Amateur tournament!
More information is our their website ofcourse, and you can also check out this thread right here: http://forum.gamesports.net/dota/showth ... Tournament