I was thinking Geneviève Bujold or Marissa Tomei. Maybe Roseanne Barr. Hmm, then again, maybe not. Oh, wait - Sandra Bernhard! There you go. Who wants to listen to a man talk for ten hours anyway?
But I don't listen to audio books, so it's probably best to let people who do listen to them decide. Seems like HarperCollins already made the decision anyway, so it's kind of a moot point.