Yup, I've been waiting for Dota2 on Linux steam for a few months now (getting the game to work via Wine & an ATI graphics card was one of the first things I spent hours figuring out after getting my linux box! http://www.hkmurakami.com/blog/2013/022_dota2_linux.html)
You didn't happen to run into (and solve) the issue of all characters moving in an extremely jerky fashion, did you (ie. take two steps forward, suddenly jerk back a frame)? It's the one thing I cannot solve and forces me to continue to dual boot >_>
