Also how can you patent a mod of WarCraft?
Sorry it was late, I meant they trademarked the name DOTA and are scooping up all of the IP for it.
http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=85102245
At any rate I kind of feel dirty about it. I know iceforg was a HUGE contributor but I feel like Valve is just scooping up a game for free.