I was almost ready to check the second option, but the real choice is walking the thin line (just like everything else).
I can't stand the PSP weight (to be fair most of the frustration was how crappy it was at web browsing, no keyboard, or touchscreen, or mouse :angry:. It is very hard to hold something as it waits for 3 minutes before telling you it hasn't got enough memory, after you wasted a minute typing in your search and trying to select the page you wanted to see).
Since the battery is going to be li-ion, and I don't think there will be a metal-caged optical drive, besides the hinged screen that will let me hold it at a comfortable angle, I figure 300gr tops, and if battery life is a real 5 hours I would be very happy. (4 hours is fine if that is on high clocks or with the Wifi going).
Will the backlight be able to gracefully conserve power with lower brightness modes (IE no flickering of the backlight)? If so then we could get longer run times if we play somewhere dim.