He's a voice actor for many many audiobooks, and I was fortunate to be introduced to his work through the Great War series of books by Harry Turtledove. Guidall clearly distinguishes the voices of a cast of several dozen major characters, and does it well enough that in my memory I hear a woman's voice instead of his for the female characters, and remember the distinct characters with their own voices. He is a very effective storyteller, and I find the book read by him to be more enjoyable than the book read by me.

He does a fantastic job, far better than I could have expected. I recommend listening to any book he's read.

Additionally, it is worth noting that many libraries have audio downloads of audio books. Free. These are unfortunately not all ipod compatible yet, but many can be burned to disc to take on a road trip. I listen to them at work.

Lloyd James also gets my praise for his work on The Moon is a Harsh Mistress. (the internet informs me he has done over 400 books. Practice makes perfect, evidently.)

Multiple voices worked very well to tell Stephen King's From a Buick Eight. The chapters of the book are broken into different narrators, so the audiobook followed the conceit to good effect.

I can't read an article about audiobooks without wanting to tell the world about Will Patton reading the Dave Robicheaux novels by James Lee Burke. He employs numerous different flavors of Louisiana patois and it's almost always easy to tell who's speaking. Even his female characters are distinctly feminine and different from each other. Burke's prose is extremely evocative of weather and geography; combined with Patton's excellent ear for dialects, the result is a totally immersive bayou experience.

I'll also tip my hat to Jim Dale, whose Harry Potter readings are second to none.

Guidall wasn't so good on "An Army at Dawn"
by Rick Atkinson, if you ask me. On "Face of Battle", the sequel, his replacement (Jonathan Davis) did a splendid job.

All-time fave may be Richard Greenwood reading "Frost on My Moustache" by Tim Moore. Simon Winchester's "The Man Who Loved China" also highly recommended. Anyway, great article on a topic near and dear. For an amusing surprise: W. Shatner.