Audio books are certainly a way of getting more FCE listening practice. Some of you will probably find that you "read" more with the aid of an iPod or iTunes.
As suggested by Teacher Dude in his comment, audio books can help you read a lot faster. Find his related posting in his blog with reading lists and his students comments on the use of audio books here and here.
Do I need any software to download audio books?
Yes, check out these sites:
Where can I get audio books?
There are sites offering them for free -or at least most of their content. Have a look at this list:
Classic Audio Books
Audio books for free
Free books on mp3
What about the accents I will hear?
This is something that will change from book to book. Notice that some are human narrated recordings and others are made using text to speech voices.
Need a recommendation to read? Well, this is precisely where your comments can help other readers, isn't it?
Enjoy your reading, I mean, listening!
Note: As usual with material you download from the internet, make sure you read and understand the license terms and respect author's copyright. Those terms may vary from site to site. Watch out!
Picture credit: Steve Crane under a Creative Commons license.
Reading Interviews and Online Magazines (some with audio)