if i could find out who it was who hacked half life 2 i would PERSONALLY go and smash their face in... no i'm not joking, it's ******* idiots like them who ruin it for the rest of us... not only in delaying the release of it, but making the source code available to writers of aimbots and other hacks.. meaning the game may be screwed as far as multiplayer is concerned before it's even released.
Hopefully Valve will use this extra time to re-encrypt the source code and make it un-hackable some how.
Ben