Thus far:
Orchestra Baobab - Jiin Ma Jiin Ma
DJ Shadow - 25 or 6 to 4
DJ Shadow and Chief Xcel - Fully Charged on Planet X (instrumental)
Steinski - It's Up to You (Television Mix)

More:
DJ Z-Trip and Galactic - Sympathy for the Devil (somehow skipped this one)
Rob Swift - A Terror Wrist
Cassetteboy f DJ Rubbish - Fly Me to New York
Mr. Lif - Home of the Brave
Sage Francis - Makeshift Patriot
Presage - The Media
Public Enemy - Son of a Bush
The Legendary K.O. - George Bush Doesn't Care About Black People (I don't think this song is all that good, but it's hard to leave out, y'know?)

Just a few more (I'm about to go see a series of short documentaries):
Stevie Wonder - Big Brother
Bob Dylan - Masters of War
Cassandra Wilson - Vietnam Blues