Sarath
iDota
DOTA 2
by Valve
DOTA 2 is being developed by Valve in conjunction with ICEFROG the current author of the Dota custom maps for Warcraft 3.
It is seen by Dota players as a direct upgrade over the existing Dota game. However being in closed Beta, it is yet to be seen if it lives up to expectations.
Official Blog: Dota 2
Created a new guide for new players:
Begginers Guide to Dota 2
Begginers Guide to Dota 2
Let the Battle begin!