Oh, yes -- I "read" the audiobook, and it's a real delight. They did it properly, with two readers for the alternating chapters, and they're both quite good at doing their characters.

I'm currently in the middle of "From the Notebooks of Dr. Brain" -- what happens when you put (essentially) the JLA into a group-therapy session. Not nearly as deep as "Invincible" from a characterization POV, but funnier and with its own insights...