My pal hugh Spenser is a hell of a science fiction writer, and he's got a passion for the golden age of science fiction radio dramas. He wrote a six-part series of radio plays about the early days of science fiction fandom, which were produced by the wonderful Shoestring Theater and aired last summer on NPR. Hugh and Shoestring have released all six epiisodes as MP3s under a Creative Commons license that allows for the noncommercial redistribution — give them a listen, they're way boss.
Amazing Struggles Episode 1, 28.8MB MP3 Link
Amazing Struggles Episode 2, 29MB MP3 Link
Amazing Struggles Episode 3, 29.4MB MP3 Link
Astonishing Failures Episode 1, 30.1MB MP3 Link