Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
The sound thing sounds like a problem to me. How many receivers have AAC decoding support? I know mine doesn't.
Unless something out there transcodes AAC to AC-3 or DTS, I can see that being a major block towards it being used for serious downloads.
Or is there a workaround, say, support for an optional AC-3 or DTS audio track?