The Dell Mini 10 is a good netbook for under $400. For just $398, you get the unusually good combination of an N450 CPU, a 250GB hard drive, and Windows 7 Starter
For just $398, the Lenovo S10-3 is a worthwhile netbook; it's got an Intel N450 CPU, 250GB hard drive, and Windows 7 Starter. Under $400, these are solid specs.
This great-looking HP Mini Note comes with the new N450 CPU and Win 7 Starter - in a price bracket in which most netbooks come with the obsolete Windows XP and are much uglier.