As the OP mentioned, I can't wait. I haven't been able to stand the wait since the first one was in theatres. I missed on the 2-disc lenticular cover version from BB, but at least I got the 2-disc with the limited comic tee-hee and have watched it probably a half dozen times.
Really, as others have mentioned I don't think that Ledger can pull off the Joker. Not in any shape or form. I'd like to see some casting calls/his audition for the part or at least how he will look in make up, so in truth I can't really say if he will be any service to the role. Still, as others have said, this is Nolan and so I trust in the Nolan and I'm sure he will not do a disservice to the fans.