Nice! I love the idea of bringing together a variety of artists and styles with the constant being the tempo, and it's fantastic that all the artists bring their own style and genre to the collab.
I only wish that there were transitions or some kind of continuity between songs to make it more recognizable as a single piece, like an audio exquisite corpse. I listened to this while working, and at points I thought the collab was over and was going to skip tracks on the Portal only to realize that it was still going on.
But hey, you all got it together and made something pretty cool. Well done! :)