This Desktop PC

Newegg.com has the NETGEAR RND2150 ReadyNAS Duo 500DB Desktop Network Server - Black for only $379.99 with free shipping.

Product description from Newegg.com:

The RND2150 from from Netgear is a 2-bay network storage enclosure that will grow as your needs do. The 2 hot swappable bays support SATA and SATA II hard drives. A 500GB drive is already installed and configured so you’re ready to go right out of the box. Add capacity beyond the hard drives with the 3 USB 2.0 ports, or you attach a printer and let the print server handle your network’s print jobs. There is a 256MB memory module to speed up operations. This enclosure uses the patent pending X-RAID technology to future-proof your sy!
stem. Add drives as necessary and swap out smaller drives for larger as your needs increase. X-RAID will handle it all automatically; no more buying a second enclosure full of drives and transferring all of the data manually. The ReadyNAS is also a fully featured media server with UPnP AV support.

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Newegg.com has the NETGEAR RND2150 ReadyNAS Duo 500DB Desktop Network Server - Black for only $379.99 with free shipping.

Product description from Newegg.com:

Directly streams music, photos and video to existing network media players without a computer
Creates a personal webpage to easily share photos with friends and family
Insert optional “spare” hard drive for automatic file protection and back-up

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TheNerds.net has the Startech 2636CABINET 15U 19” Professional Rackmount Computer Server Cabinet for $1035.30 + $43.48 shipping = $1078.78 Shipped.
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Buy.com has the Super Micro Computer SYS5015MMFB Super Micro SuperServer 5015M MF Rack Server $474.99 Shipped after $15 off $200 new customer coupon.
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