This month, Christianaudio.com is offering The Brothers Karamazov by Fyodor Dostoevsky as their free title. It's an abridged version, meaning that it's a mere 19.25 hours long. It's also available in WMA and MP3. This is narrated by Simon Vance, an award-winning narrator -- for example, he recorded The Girl with the Dragon Tattoo (which explains why his voice sounded so familiar when I listened to the sample

).
Yes, you do have to create an account to get it. Also, remember that you have to enter the code DEC2009 when you check out to get the free title. Oh, and as with all their titles, you are allowed 12 downloads. Also, although they are a Christian audio book store, don't let that turn you off as they also have lots of classics that you might not count as Christian novels -- Jane Austen, etc. Their prices for downloads are good, with many titles under $10.
Whoops, here is the link:
http://christianaudio.com/free_download.php
I just noticed this offer, too. Until December 16, if you buy someone a $25 gift certificate, you get a $10 gift certificate for yourself.
http://christianaudio.com/christmas