Right, this is what I know? DOTA (Er...Death Of The Ancients?) was a mod for, umm..Warcraft III.
I never played it. Now DOTA 2 is on the way. So I watched one of the streamed tournament games at http://www.dota2.com/tournaments/international/ but then realised I didn't know what was going on.
So, can someone tell me a bit about the game pls?