It's being released here in the UK on the 30th November for the PS2, PSP and Wii. Take Two had to take out some of the content for it to be allowed to be sold over here. No plans for it being available on any other platforms at the moment, not that I've read anyway.
Edit: Just read that the BBFC refused to allow Manhunt 2 for a second time on the 9th October, so there goes.