If you are going ATOM dont go 945 chipset AT ALL
Get one of the ION boards.. Half decent GPU and over-clocking to boot
I have been using hte ATOM 230 (same speed as 330, but has HTT instead of dual core) and I have to admit...if you can get a ATOM CPU and a 9400M setup for $50... it is worth it. Unfortunately they cost 3 times that and you can just build a real dual core setup that uses not much more power and totally destroys it in performance for the same price.