Any of you guys seen the fan film,
Batman: Dead End? It's basially Batman vs. Predator vs. Aliens. Corny concept I know, but the Joker in it, Andrew Koenig, is how I picture the character being played the best. If Heath can pull it off as insane as the guy in that short film did, then I might be able to forget he was in that movie with the "Mountain".
Andrew Koenig = My favorite Live action Joker so far.
Mark Hamil = The BEST Joker voice EVER! "Hello Batsy!"
edit: Here's the video for those who don't know.
http://download.theforce.net/theater...ull_Screen.mpg