As you may have read, on the 15th of May "Occupy This Album" will be released. It contains 99 tracks by 99 artists, and it looks like there will be some good stuff for everyone there. Just check the website at http://musicforoccupy.org/ It costs $16,99, all goes to 'the movement', but I'm sure you can get it for free with your favorite p2p client. Here is an article about the guy who is organizing all this.
The video on the top is a talk by Boots Riley from the Coup (the ones from “Steal This Album”) who visited the Netherlands two weeks ago. He talked about the Occupy movement and the General Strike in Oakland.