Well that's just it, aside from Thoughtfix's blog posting, nothing has been incredibly clear as to that the 770 actually does. Ok, so it's in hostmode. Thoughtfix has said it will automatically detect a USB keyboard properly, no tweaking required... I've read nothing difinitive about mass storage, etc. If I plugged a USB mouse in, the 770 wouldn't have a clue what it was. (I would imagine).