In the past year or two, I've done a lot of audiobook reading, since I put in a lot of windshield time and I can get the books for free through the library. I listen to them while I drive. I've read all of the Aubrey/Maturin books this way (which I greatly enjoyed), and now I'm on a P.G. Wodehouse binge (Jeeves and Wooster, Ukridge). This has been a terrific way to spend the time.
I'm thinking that after Wodehouse, I'll do Tolkien via audiobook. I first read the print books back in the late 60s, and then again about ten years ago. This time I may audio-read the LOTR books . . . then watch the LOTR movies, the extended version . . . then read the Hobbit book . . . and then be ready for the Hobbit movie when it comes out.
I don't know how many audio-book versions there are out there but this guy has done a pretty nice job and it's all free on Youtube or you can download an MP3 version, which he says is better, from his website. He hasn't finished the project yet but he's well into the third book and it looks like he will get it done.
Audiobook Read by Phil Dragash and edited, and mixed, sound-effected, and designed. Music by Howard Shore for the Films by New Line Cinema.