After the announcement of big DotA 2 Tournament, Valve is preparing for the launch of the most anticipated game DotA 2 and has made DotA 2 Steam page live on Steampowered store for welcome. The steamapp page contains the description & old concept arts but no option for pre-ordering the game still, you can add it to your wishlist.
However, at the bottom of the page it reveals some precious information about the Beta status of DotA 2:
”Valve is targeting this fall for the large scale beta”.
It seems there is going to be a large scale public beta testing coming this fall yet there are no details mentioned about the DotA 2 Beta Keys/Invites. Aside from all this, Some game developing companies like Arrowhead Game Studios has reported to have received DotA 2 Beta invitations from Valve.
Below, You can see the status @magickagame:
Dota 2 on Steam