B Jones writes in with the glad tidings of a site hosting a torrent of several Mercury Theater on the Air radio broadcasts featuring Orson Welles, including:
45 Campbell's Playhouse productions, all 7 audio-chapters of Les Miserables, 7 Mercury Theatre on the Air productions as mp3s and 10 as RAM files, a short piece on Welles Meets Wells, "a radio special about the Mercury Theatre on the Air hosted by Leonard Maltin, featuring interviews with the surviving members" (which is amazing), a rehearsal of The 39 Steps and a priceless mpeg4 video of the famous all-black Macbeth.
(Thanks, B!)