Below are links to free concerts MP3's...yes FREE FULL CONCERTS from National Public Radio.
Check these out:
The Good, The Bad and The Queen- Live in DC (March 07)
http://www.npr.org/templates/story/story.php?storyId=7780450
The Arcade Fire- Live in New York (Feb 07)
http://www.npr.org/templates/story/story.php?storyId=7273765
Iron and Wine, Calexico- Live in DC
http://www.npr.org/templates/story/story.php?storyId=5029368
There are much more at http://www.npr.org/templates/topics/topic.php?topicId=1039