Thanks for mentioning that - I don't think it was there last time I looked at that page.
I was also under the impression (since MWestion hadn't recently confirmed the internal microphone, and did say you could plug one in via the a/v port) that the microphone was external only in this reveision, despite it having been confirmed a long while back, but hey. Glad I was wrong, since VoIP was a serious reason for getting a Pandora in the original instance!
Especially if we can get Skype on board, but, well, who knows whether that'll happen...
EDIT: Strikes me this is actually the first time a clock speed for anything other than the dev-board has been released - 550MHz. Fingers crossed for overclockability, though, and 550MHz is still a LOT of power!