This posting on the Mental Floss blog reminded me of a resource I often forget: the live music archive:

The Live Music Archive currently contains nearly 40,000 recordings from over 2,000 performers. Some of my favorites: Mike Doughty, The Weepies, Andrew Bird, The Decemberists. Also check out the overwhelming full list of bands. (Tip: check the FAQ for info on how to deal with lossless file formats like FLAC and SHN that you’ll see in the archive.)

You may need to spend some time getting set up for Flac/SHN if you don’t download a lot of music online, but it well worth it to get the higher quality recordings.