Audible support for Rio Cali

Awhile back I got a Rio Cali MP3 player, overall I really like it… the controls are nice, the built in FM radio is great… But there is one problem… No support from audible.com. In an attempt to keep control over the media, audible wrote their own client software for interfacing with the deices (which isn’t great) but they don’t seem to have drivers for my Cali. At first I just thought it was because the Cali just came out, but it has been a while now and I am starting to believe they will never support it. I already sent audible’s customer support folks an email, but I heard nothing back.

Thoughts? Workarounds?

Thanks!