Last son of Krypton podcasts
Just read this post referencing this. Am listening to it right now.
There seem to be heaps of other fan broadcasts as well:
Superman: The Last Son of Krypton
Batman: The Ace of Detectives
Wonder Woman: Champion of Themyscira
Supergirl: Lost Daughter of Krypton
Catwoman: Queen of Thieves
Martian Manhunter: Strange Visitor
Imperium (Earth-P Crossover I)
Vindicatum (Earth-P Crossover II)
Ex Tempus (Earth-P Crossover III)
Star Trek: Defiant
Star Wars: Blue Harvest
James Bond: To The End
Indiana Jones and the Well of Life