MSI Ultra-Thin 13.4" Notebook, Atom CPU / 320GB / 0.79" Thin / 2.8 lbs for $379.00 shipped.  Here is a screenshot for your reference.  Alternatively, it is available here for $389.99 shipped.  It features an Intel Atom 1.6GHz Z530 CPU, 13.4" LED-backlit LCD at 1366 x 768 resolution, 2GB RAM, 320GB drive, wireless 802.11b/g/n, and Windows Vista Home Premium.  Note that it does not come with an optical drive.  It is also eligible for Free Windows 7 Upgrade.  Most places have it for over $600.