I saw a story about this on ABC News last night and wondered if I've been living under a rock or something since I'd never heard about this before. I'll link the organization at the end and let them tell you more about what moved them to do this. In the meantime, here's the briefest of explanations.
Mark Johnson, a documentary filmmaker and a man on a mission set out to record musicians from around the world. They range from street musicians to international headliners and everyone in between. Basically, he recorded one artist performing a song and then invited other musicians to listen to what had been recorded before and add their own track. Some musicians, he purposely sought out...others, he was introduced to as things progressed.
It's really incredibly wonderful.
Here's the Playing For Change website. In addition to bios on all of the musicians (and additional performances), you'll find Mark Johnson telling you what it's all about. You'll also find out how to get involved...if you feel moved to do so.
If you don't have good speakers, at least do yourself the favor of playing this through headphones.