I came across this blogsite offering downloads of live shows. These are mainly FLAC recordings but there are also DVD's on offer.
What's impressive about this site is the sheer quantity of material up for grabs with 1000's of shows available to download. Lots of psych and prog bands are represented; scroll down to see the full alphabetical list of artists. Click on the TITLES for links.
The only downside is that the free downloads are pretty slow but there are plenty of mirror sites and options to speed things up.