I bought a Toshiba NB100 from LHR T5 for less than US$400 a few months back, much more expensive here in Switzerland.

Has an Atom cpu, 8.9" screen with 1024x600 rez screen, 160gig HDD. It's plenty fast for light tasks, you could upgrade the 1gig ram to 2 if you want. However the keyboard is not that good as the buttons are very small and require good pushing to register the key stroke. But it has all the buttons (including F11 and F12 which require an alt-key combo to used on say, a Dell 9).

But the upside is that it's VERY small (one of the smaller netbooks out there), weighs about 2pounds/1kilo, and I was surprised at its overall speed even with resource hungry McAfee installed. Like others have said, I too experience a hitch nw and then, say when opening multiple browsers, and the default install contains some junk meaning I reinstalled mine from scratch (no cd drive, had to make a bootable usb stick).

Intel is releasing dual core, faster Atom cpu's in the 4th quarter, you might want to wait if you want a faster setup. I personally really like the Dell 9 and 10. Looks real nice, proper buttons to press too