I will post more pictures when I get a chance. But here are some answers to your questions:
On the 7400 battery life is about 2-3 hours.
On the integrated, it is about 4:50, but note that I did not reinstalled the OS due to the reason that people are having problems.
There is some flex in the screen, but with something this thin, I would say that it is really impressive. They keyboard does flex a little, but I did not really notice it until I looked at it closely. The first thing I did notice about the keyboard is that it is more deeply set that my 700m, meaning that when I type it doesn't bounce back as fast and slowed me down.
There are no heat issues. It runs MUCH cooler than the 700m, however the fan is driving me nuts. It vibrates a little bit and is always on. The 700m is a very quiet laptop. I would say that the SZ160 is much more quiet than my T40 though.
Yes, I kinda ruined the effect, but it was to prove the point