Valve has released a spectator client for Defence of the Ancients 2 which allows users to watch matches complete with commentary.
The client allows users to watch current or recently played matches of Dota 2 for free with several camera options available, such as player cams and director mode. The client will also include every match from the Dota 2 International $1 million tournament.
Valve appears to be trying to move into the eSports scene in a big way and this is one major step, you can download the client through Steam right now.
Will you give the client a try? Let us know in the comments below.