athlon ii neo
I wish you'd gotten a neo review out sooner! After much agonizing (and pouring over reviews online) I just bought an Acer Aspire One with the same processor as this samsung.
On windows it was a DOG, and booting was a chore. I only dealt with that for about five minutes before I slapped ubuntu on there. Normal ubuntu froze on boot, but xubuntu installed fine for me, and it's quite zippy. Booting probably takes around twenty seconds and applications start quickly enough, though you're right in that it's not very good at multitasking. I didn't really buy it for that, though, the most multitasking I'll be doing is listening to music while writing, so it's OK. The video card rocks, though, and can handle anything I throw at it (some fancy compiz effect, mainly, and the occasional game) without problems.
My main question, then, is how does this compare to a single core intel atom processor? That really seems more like the appropriate competitor than a dual core notebook processor.