I should add some things here.
My flat mate bought a One, it's let me do a side by side with my eeepc 901
He got the SSD version, he didn't need the extra space (he uses it mainly for typeing doc's) and prefured the SSD for the added portability (shock proof)
The Linpus Lite OS is fine as long as you don't want to fiddle with it in any way or install additional software. Probably the worst netbook OS for tinkering with.
Size wise it's the large 11" case which allows for the silghtly bigger keyboard, which I must say is nice over the smaller keyboard of the 10" case (case size is roughtly 1" larger the max screen res btw)
Side by side the One's screen is nice, not quite as good as the Samsung NC10 but still good and better than the eeepc screen (whites are a bit muddy on the eeepc)
It's not quite as solid as the eeepc but still pritty robust feeling.
The battery life is pants, however this does give it a nice weight advantage, it's far lighter than the eeepc901 or NC10
Oh and btw MSIC, you better check but I'm pritty sure you'll find it's the same as other netbooks, it only has one memory slot not 2.
You can however buy a 2gb stick to replace the 512mb it comes with.
You can also get higher capasity battries, but they are not cheap and add quite a bit to the weight.
EDIT: Oh and yes the touchpad is not very good.
That's one thing the eeepc 901 is overlooked on, probably the best touch pad of any netbook I've used so far.
