Downloading Audiobooks?

I've had my Droid for a week now and I am trying to venture into unchartered territory (well.. unchartered for me at least!)

I usually download audiobooks from my local library. I use OverDrive Media Console to download them to my computer, then I can transfer them to my iPod. (Oh.. gosh.. I used the "i" word!!!) Well, I'm would love to get rid of the "i" thingy and do it all on my Droid. However, when I attempt to download the book, from OverDrive to the Droid, I am unsuccessful. The message that I receive is - "The format of this title (WMA Audiobook) is not compatible with the Motorola A855 USB Device"

Is there an application that I can use to download audiobooks? My search so far hasn't found any. Can anyone offer any suggstions?

Thanks for any help!