I havent heard that one yet. I guess its new. Where did you find it on the net?
Their only real album is "Lets Get Free." Its a great CD, so swoop it on sight if you see it. They released a half-ass mixtape called "Turn Off the Radio" under the artist name DP'z (instead of dead prez). Its aiiiiight. A couple bangers, nuthin too special.
But they tightest shit is actually unreleased stuff or stuff off soundtracks. Try to find a song on the net called Dem Crazy with the Marley Brothers. And the Game of Life and the Tony Touch Freestyle/Fuck the Police. And a gang of other stuff.