Depends on the band and their rules on taping and sharing.
Sources to watch:
Hittin' The Web forum for ABB recordings, B&P & vines only
for ABB recordings, B&P & vines only
Live Music Archive - http://www.archive.org/details/etree
(membership hard to get, keep trying every half hour until you get in)
If this forum stays up, maybe we can do some vines here.