Heroic Images have mp3 recordings of the Justice League LP from the 70's available in their download section.  If you are at all a fan of comic books these are definitely worth listening (and cringing) to.  These are easily as bad as the William Shatner "Tamborine Man" cover.

I especially dig on "The Flash" and "Plastic Man" songs.

From the "Plastic Man" song:

Plastic Man! Plastic Man!

The one, the original elastic man!

Always in great shape, for the shape he's in!

The fantastic Plastic Man!

I tell you, you can't beat that with a stick!

Update: Oh, I guess I should mention that I got this from ultra-nifty neilgaiman.com!