On another note, I've just finished listening to Harry Potter (1-7) audiobooks read by Stephen Fry - and he's marvellous as an actor there. Every main person he read had a different type of voice, a different way of speaking, melody, and pronunciation, and you mostly could know who was speaking even before the narrator said so, all on the courtesy of the one throat of Stephen Fry.
Now listening to Hitchhiker's Guide To Galaxy. Nice to see he has also a blog, and even sometimes reads it with his own voice.