While not directly related to scanning, here is a very NICE collection of OLD TIME RADIO shows...Free. It is a very large database of audio files for the taking.
Some of the old timers on this site may enjoy going back to the days before TV and computers.
For the younger people here, listen to some of them. HAVE GUN WILL TRAVEL is great. The expert narration and descriptions can paint a picture in your mind of the unfolding drama.
http://www.otr.net/