A little pricey at $849.99 with no disks, but really looks interesting.
Amazon.com: Netgear RND4000-100NAS ReadyNAS NV+ 4-Bay Desktop Network Storage (No Disk): Electronics

• Desktop Network Storage Device offers an easy-to-configure and cost-effective way to store data and stream digital media
• Ultra-compact box has four empty bays (no disk), and is designed to fit easily on your desktop
• Hardware-accelerated RAID and X-RAID technologies combine for a simpler, more secure way to protect and store your data
• Advanced-server monitoring features alert you via email when something is amiss; it even shuts itself down if the operating temperatures of the disks are too high

Linux-based NAS storage devices expand capacity

Netgear has introduced five Linux-based networked attached storage (NAS) products. Targeted at “prosumers” and small to medium-sized businesses, Netgear’s ReadyNAS NV+ systems offer higher capacities than previous Infrant models, and come in 1.5TB (terabyte), 2TB, 3TB, and 4TB versions, as well as a 4TB rackmount version.