Asus Eee All-In-One PC, 20" LCD, Atom 1.6GHz / 2GB / 320GB for $483.14 shipped.  Here is a screenshot for your reference.  This all-in-one PC features an Atom CPU at 1.6GHz, 20" LCD, 320GB drive, wireless 802.11b/g/n, media card reader, and Windows Vista Home Premium.  It is also bundled with a set of wireless keyboard and mouse.  Note that this is not meant as a performance oriented PC but rather a simple, all-in-one solution with a minimalist design.  Here is a review for your reference.  It is also eligible for Free Windows 7 Upgrade.  Most places have it for about $549 or more.