“The National Football League on Tuesday announced an agreement with Audible Inc., an online distributor of audiobooks and other spoken-word programming, to make recordings of this year’s remaining playoff games available for portable audio players, including Apple Computer Inc.’s iPod.”
There are other specific sites for podcating like Podcast Central. But there are plenty of sites for just regular audio files.
I previously mentioned the use of sources like the audible.com and Library of Congress for audio files.
There are also a large number of Internet Radio sites with downloadable and streaming content.