Wow, a lot of posts that would lead to making it larger and more expensive! I agree with those who say to keep it low priced so to compete with the iPod Touch. Also, lets Keep it small enough to fit in a pocket. Those wanting it to be a full laptop computer should find an ASUS eeepc forum and tell them to make the next model based on an ARM processor so it will run for more than two hours on batteries, then load it up with all Open Office, VGA in/out ports, keyboard features, etc. In other words please don't ask to make the N900 something that is so different (as in much larger and expensive) that those of us that bought the current models would not be interested in it!
Back to those dreaming about doing the presentation in a board room on a NIT: They forgot that the special docking port would NOT typically be pre-installed in the board room and that it would require external power. By the time you tangle with all that mess you would be better off with a one-piece laptop anyway. Just demand one that has decent battery life. I don't know why every time an advance is made in laptop power, they compensate by putting in a smaller battery!
It seems like a lot of people who have owned several NIT models seem to like the size of the N800 the best. Maybe if the N900 went back to this size we could get some of these bigger machine features squeezed into it like bigger screen, better keyboards, bigger battery, full-sized SD, etc.
Finally, the supercapacitor is probably too big. I think a better solution the problem is for a 3rd party to make a sleek, thin external battery pack that nicely attaches on the back of the NIT and plugs in the charger jack. You could probably quadruple the battery life while only adding about 4mm across the whole back of the unit.