All-in-all, if you don't mind the relatively pokey processor and integrated graphics, and are fairly adept at navigating a computer using just the pointing nub, then the nc2400 seems like a pretty good way to shave some pounds from your travel gear.
Sure, it won't help you love your pokey PC or Mac any more (though Apple's doing its own work on this problem with its misnomered "instant on" feature on the MacBook Air, which wakes the computer from hibernation in a few seconds), but it's a nice glimpse of what's to come.
The 9300i is exactly the same as the 9300 in every way save for the addition of WiFi, which turns out to be a mixed blessing because the pokey 150MHz processor can't render pages as fast as the 802.11 can pull them down.