Use the eeepc 901 myself and I am very pleased with it. Good battery life and clear screen, I would not like to write a very long document with it but for mobile use it is very good; I even have a few films downloaded onto an SD card for viewing when I am away.
As for synchronising between computers, I use SyncToy which is a free Microsoft power toy and it syncs files between my Vista desktop and the eeepc.