Legal or otherwise? For illegal, I’d try bittorrent sites like the pirate bay and the like.

As for legal, here’s a few sites:

http://librivox.org/

http://freeclassicaudiobooks.com/

Yeah, I’ve used Librivox, the only issue is that they’re volunteer readers. Remind me to let you listen to a part of the Emerson’s Three Great Virtues. The guy sounds like a slow Ben Stein. All the books on there are “in the public domain”.

Other than that, if your comp gives you an issue, just let me know – I’ve got a pretty good torrent system, and I’m more than happy to download whatever you want and I’ll burn them to CD for you…Actually, I may be able to upload them directly to your thing.