Amazon has update their product page for the The Music of Grand Theft Auto IV soundtrack which comes with the Special Edition of the game, and can also be purchases separately. There are 16 tracks, some by bands you may know others by unknown bands. Here's the track list:

• Soviet Connection (Theme from GTA IV) by Michael Hunter
• Dirty New Yorker by Mobb Deep Featuring Havoc & Prodigy from H.N.I.C. Part 2 Sessions
• No Sex For Ben by The Rapture
• No Fraid A by Munga
• Where's My Money by Busta Rhymes
• I Want You by C.J.
• Rocky Mountain Way by Joe Walsh
• Stand Up Jamrock by Bob Marley & The Wailers and Damian Marley
• Liberty City: The Invasion by Seryoga
• Vagabond by Greenskeepers
• On A Journey by Electrik Funk
• Nickname by Qadir
• Holy Thursday by David Axelrod
• War Is Necessary by Nas
• Zombie by Fela Kuti
• 5:23 (Maiden Voyage) by Global Communication

A few facts:

• There are 16 tracks in total.
• Michael Hunter; who made 'Soviet Connection' which is the games main theme, also did the main theme for San Andreas.
• Seryoga has an exclusive song entitled 'Liberty City: The Invasion'. You may remember him from the song in the third trailer.
• You can purchase the Soundtrack separately (not in the Special Edition box) on Amazon.

Source: Amazon