Ubuntu is on record as supporting ARM.
I'd be happy with a netbook with an ARM chip instead of an Intel chip, provided that's the only change. WiFi and USB covers all other connectivity.
My Aspire One unfortunately wastes a lot of its battery power as heat, but I know some Intel-based netbooks get many hours out of their battery. I would expect an ARM-based netbook to get a few days. :-)
Bring it on!
Wade.
Q:Is it proper to eat cheeseburgers with your fingers?
A:No, the fingers should be eaten separately.