Bob:
If you want some more of him but don't quite want to buy anything yet, try this
http://www.archive.org/details/audioThere are a number of Jack Johnson downloads under "Open Source Audio" and Live recordings in various recording quality, MP3 at various bit rates, Ogg Vorbis, VBR, Flac. You can search by recording quality, Artist, genre. If you are a Grateful Dead fan, there are thousands of live concerts recorded and archived here. All of these can be downloaded and recorded to CD, sent to your Ipod or streamed to your Squeezebox, etc.. Remember, check out the "Open Source Audio" and "Live Music Archive". You'll be surprised at how many names you will recognize and how good a lot of the recordings are.
Harold
