Dear Stepien,
Thank you for contacting Audible.com.
I understand you are wondering when the Blackberry 10 will be supported.
Audible is currently working on making all existing devices compatible. While the brand is not new to our service, there is a general interest in consumers like you to convert the entire Blackberry model brand into an Audible supported device. As of right now however, the Blackberry 10 is not Audible ready.
Even though we currently do not have a time frame on its availability, you are always welcome to visit
Audible Device Center | Learn About Compatible Devices | iPod, MP3 Players, PDA's, Mobile Phones, GPS Systems | Audible Audiobooks | Audible.com and check our updated models. When a device is made compatible, the manufacturer of the device changes the firmware so that the device can read and play back the .aa file format we use on our website. These .AA files are special encrypted files to insure the copy right law protection we have with our publishers. We are more than willing to support yours and every device; however, the manufacturer of Blackberry 10 has not expressed an interest to make it compatible with our service. Our company actually has aspirations to be compatible with every device on the market and that continues to remain one of our goals.
If we can do anything else for you, please do not hesitate to contact us, we will be happy to help you.
Have a nice day.
Sincerely,
Giovanni
Audible Customer Support
As to transferring audible files to BB10 the cheapest and easiest way is to burn it to a CD and rip it back in whatever format you want. I've done that many times with iTunes files long time ago when the files were still protected.