Buy.com has the Iomega StorCenter px4-300d Network Storage Server (35098) for $578 - $100 rebate
[Exp 3/31] = $478
with free shipping. Features up to 12TB capacity, Intel Atom Dual-core 1.80 GHz processor, USB 3.0 and ethernet ports, and supports protocols JBOD, Apple Bonjour, FTP, DLNA, and more. B&H Photo Video
has it for $489 shipped
with no rebate.