Shit! Hope he recovers well, great actor and it would be a great shame if we lost him too.
Dark Knight seriously is one of the best films ever IMO, especially if you view Batman Begins and The Dark Knight as one big film. Simply amazing. Heath Ledger's performance was easily worthy of a post-humous award, and I'd be very surprised if he doesn't get one. Also his makeup was awesome, really did make him look maniacal.
I'm guessing Two Face's makeup had a lot of CGI for it, but it was great how it showed his whole eyeball due to the fact his eyelid had completely burnt away. I think someone mentioned it being a bit of a terminator rip off in this topic. I don't see it as a rip off because he's a real human being as opposed to a metal endoskeleton with tissue covering it. He'd be in a great deal of pain if it was real. I thought it looked pretty cool anyway, regardless of any similarities.