Me too. And recently I stumbled upon http://archive.org/details/oldtimeradio
This site has thousands of radio shows from the '40's and '50's, in MP3 format. All are free and easy to download. Comedies, dramas, detective stories, westerns, etc. Most are 30 minutes in length.
If you like detective stores, I recommend "Yours truly Johnny Dollar". For westerns, "Gunsmoke".
Excellent info!