I noticed that the BBC has put a fair number of John Peel Sessions on line now, although the ones from the late 1990s and into the 2000s seem to be track listings only without actual tracks to play.
I've picked a few live track extracts available for some of the well known bands, just as an example of the type of material available. Certainly worth a look and a listen. Every so often the BBC seem to isue a complete CD of one of the sessions.
billy bragg cat power david bowie faces jimi hendrix nirvana pj harvey pink floyd pulp t.rex top 125 gigs