So while Crackdown 2 is very much the same style of game that everyone either loved or hated.  I just have to mention how great I thought the music was in the demo. 
 
I wont lie that I think Perfect Dark for the N64 had some of the best music ever in a game.  The menu music in Crackdown 2 could easily have been placed inside the classic Perfect Dark game and fit right in, it never gets old. 
 
Anyway after blowing some stuff up and calling in some choppers - I jump around until finding a vehicle to drive.  I am instantly greeted to a Creedence Clearwater Revival: Bad Moon Rising remix.  Its great and I stay in the truck to listen to some more songs.  My time limit expires with me sitting in car, I guess I wasn't that concerned about saving mankind.  
 
I can see the fun I'll have carrying my car sized jukebox around with me once I'm strong enough to pick them up, causing chaos at the same time.
 
I found this good article about the man behind the music, its an good read -  http://www.joystiq.com/2010/05/14/interview-audio-director-kristofor-mellroth-on-the-sounds-of-cr/