Amazon.com has revealed the soundtrack that will be sold in stores and come in the special edition package of Grand Theft Auto IV. There are some familiar faces, such as Michael Hunter who made the theme for Grand Theft Auto San Andreas, turns out he also made the theme for Grand Theft Auto IV. The track listing is as follows: 
 
Soviet Connection (Theme from GTA IV) - Michael Hunter 
Dirty New Yorker - Mobb Deep Featuring Havoc & Prodigy from H.N.I.C. Part 2 Sessions 
No Sex For Ben - The Rapture 
No Fraid A - Munger 
Where's My Money - Busta Rhymes 
I Want You - C.J. 
Rocky Mountain Way - Joe Walsh 
Stand Up Jamrock - Bob Marley & The Wailers and Damian Marley 
Liberty City: The Invasion - Seryoga 
Vagabond - Greenskeepers 
On A Journey - Electrik Funk 
Nickname - Qadir 
Holy Thursday - David Axelrod 
War Is Necessary - Nas 
Zombie - Fela Kuti 
5:23 (Maiden Voyage) - Global Communication 
 
In this 16 track album there are a couple of custom songs that Rockstar did make, you can hear a preview on Amazon.com. 
Source: Amazon.com 
Update: It appears Amazon has taken the music down, clicking that link will result in an 'Access Denied' message.