Ok.. I'm watching Dark Knight and surfing, and came across this thread.
David Suchet and Bob Hoskins, both fine actors would be wonderful-- but they won't get the part. We can wish, we can hope, but after Dark Knight it's gonna be biggies.
Penguin is short.
Penguin is round.
Cobblepot was teased terribly as a child to the point he cracked. He's a dark son of a ***** because of the height,weight, nose. Think more Joe Peci in Goodfellas-- the little guy who is looking to prove he's tough.
I actually think the Jack Black suggestion is on the money. He'd be looking for a non-humor role, he has box office cache, and he's short and rotund. Phillip Seymour Hoffman was awful as the villain in MI3.