Here's a first-impressions by JKK mobile
http://www.jkkmobile.com/2010/11/sam...pressions.html

I have not watched the whole thing, it's 40mins long!

EDIT: Here's a neat fact that may not be known about battery usage (31:00m)
- JKK got 6-7 hours of full-throttle usage on the device (games/videos/etc)
- JKK got 15 hours of moderate-to-heavy usage with the device.
EDIT: Adobe should be ashamed of itself. Flash CPU utilization on a website is around 60 - 90%! It's a battery drainer, and there's really no excuse for this performance. It's a bulky unoptimized bit of code. (~34:00m)
EDIT: It shows that Twitdroid actually has a tablet friendly interface! (~36:00m)

This is very encouraging and excellent battery life. I would imagine that light usage would easily provide a day or two of usage.