NPR has a couple of albums that you can stream from their site.

First up is the new collaboration by Shins frontman, James Mercer, and Danger Mouse called Broken Bells.  While the Shins linup is changing, the band is going to a new label, and Gnarls Barkley is between albums, Broken Bells formed and put out a pretty fantastic record.

Second is the latest installment from Gorillaz who will headline Coachella later this year.

UPDATE:  fixed the Broken Bells link as it was broken.  Thanks Erik!

An official CD album of the forthcoming project by Danger Mouse, Sparklehorse and David Lynch, will not be released due to the risk of legal action from Danger Mouse's record label, EMI. - Source

Beck has drafted in knob-twiddler extraordinnaire Danger Mouse to sprinkle some magic over his next album. - Source

DJ Danger Mouse is in hot water with EMI for mixing The Beatles' White Album and Jay-Z's "The Black Album" to create his Grey Album without authorization to sample either record. While some might find the combination blaspheomous, I think it outshines a lot of the crap mixes out there. Check it out.