Just another 'me too' post. I have 2 transformers in the house. Upgraded one (a B80) to revolver and lose audio a few times. Reboot brings it back. When it goes away, no sound from speakers or headphone jacks. Next time it happens I'll try and grab a logcat.
Haven't tried it on my older rev TF yet, I think i'll hold off a bit.
The B80 was wiped and done with a clean install. User apps restored via TB, but no settings were carried over from HC.