I just discovered this site http://www.archive.org/details/etree, and I can’t believe how many fantastic FREE songs/concerts are available in many different formats for downloading. Sure, there are many misses, but there are enough hits (Grateful Dead. Josh Ritter, Cowboy Junkies, Spoon, John Mayer, Ryan Adams, My Morning Jacket…) that I’m sure that you’ll find something to add to your Clip/Clip+. Maybe you are already aware of this site, but if not, go check it out.
As I am typing this the site happens to be down for maintenance, so you may have to wait for it to be up again. I’m told it has something to do with their updating the servers.
If you feel hesitant that this is some kind of scam (as I did initially) just click on the FAQ tab and read about the project
Also, please post back here if you discover an artist or concert that is worth checking out. There are so many listed that I never heard of and I’m always looking for some good tunes to add to my Clip+. Enjoy.