Power and space saving computers are in, and Shuttle has a winner with the XS29F. This little gem really skimps on the power consumption to the tune of around 20-25 watts on average. That's less than half of that 60-watt light bulb shining down on you right now. For the Do It Yourselfer (DIYer) on a budget this box makes a lot of sense.
The size is right, too, as the unit measures a skimpy three inches tall and a little over seven inches wide. Two doors on the front reveal the DVD drive, two USB ports and the typical audio in / out jacks. A power brick similar to one you would use with a notebook computer helps offload some of the electronics and heat generation outside of the box.
Probably the single most important question to skeptical DIYers is "How hard is it to assemble and get the OS installed"? Rest assured, the assembly part couldn't be easier, and with Linux as the OS it just works. Two thumb screws expose the inside of the box, and all you really have to add is memory. You'll probably want to add a hard drive if you plan on using it as a desktop machine.
http://www.linuxlinks.com/portal/news/article.php?story=20090625150950123