It's called Live From Nowhere Near You: Volume II, and all profits will go to the Oregon based charity Outside In.
No word on the nature of the boys' contributions, but here's the album description from the record company's website:
Kevin Moyer went into his attic studio alone with an idea and emerged with an emotionally vibrant compilation full of life and found sounds. By collaborating street musicians with friends and music professionals, he tells a story of life on the streets and the roads leading to and from there.
With thick layers of raw and polished instrumentation, the music hits like waves of emotion eddying between the warmth of a large wool blanket and the cold of a concrete pillow.
As the sounds of turntable beats wind through crowded streets and dark alleys, inspired guitars and haunting vocals dig into your chest and squeeze your heart.
Other notable names appearing on this record include Daniel Johnston, Modest Mouse, The Strokes, Elliot Smith, Bright Eyes, Spoon, Corin Tucker, Josh Homme, Shawn Smith, and many many more. In other words, this has the potential to be very, very good.
The album will be released on July 6. Pre-order it here.