Sign me up. I'm a sucker for pretty much any co-op game. Despite all the issues with the first game, the set pieces sold me on it. The Heat shootout on the streets, as well as the one in the club were worth the price of admission alone. Realizing that I had just shot up a bank full of civilians and seeing the cops with actual pig-heads while playing as the mentally unstable guy was a nice touch, too.
I think IO has run out of Michael Mann movies to borrow from though. Last of the Mohicans style flashback, maybe?