CompuLab introduced a tiny fanless PC using 4-6 Watts of power. The Linux-ready "Fit-PC Slim" measures 4.3 x 3.9 x 1.2 inches (110 x 100 x 30mm), but includes a 500MHz AMD Geode LX800, Ethernet, VGA output, WiFi, and a 2.5-inch hard drive option, says CompuLab.

Every geek needs a large power-hungry supercomputer, right? Wrong.

French company Linutop offers a tiny machine - the Linutop - no bigger than a mid-sized paperback novel. Weighing a mere 250 grams, this machine will make cleaning your desk a breeze. The Linutop is powered by the AMD Geode LX700, and consumes just 5 watts of power - a sure benefit to any taxed power grid. The Linutop has no moving parts and boasts 4 USB 2.0 ports, ethernet, audio in & out, and 250MB of RAM.

This mini PC uses just 8 watts of power which is a quarter of the power used by the average laptop. It comes in a tough aluminium case and has no moving parts, it is also completely silent, and comes with everything you need including office compatible software, it runs Puppy Linux.

The beagleboard is low cost fanless development board with Linux support. And it is low cost, you can get one for $149 from digikey. And it is low power, it uses less than 2 Watts and can run via USB power (although it does have a secondary power input).

Acrosser has introduced a compact, fanless computer aimed at the harsh environments found in trucks, taxis, and other vehicular applications. The AR-ES0831FL runs Linux on Pentium and Celeron M processors, and meets IEC-68-2-6 vibration and IEC-68-2-27 shock standards, according to the company.

With just wind power, solar panels and free software, IT consultant and wife run two businesses off just 20 watts of power.

Marvell announced today a new type of computer. It's about the size of an AC to DC converting wall outlet plug, but is really a full SoC with a 1200 MHz CPU, built-in 512 MB Flash, 512 MB DRAM, Gigabit Ethernet and USB 2.0 support. It runs small versions of Linux, consumes about 5 watts.

Power management on computers has three parts: selecting devices that are more power-efficient, tuning your systems to run more efficiently, and configuring systems to use less power during periods of inactivity. Servers, desktop machines, and laptops usually need different power management schemes; there isn't a one-size-fits-all.

Shuttle has released a fanless mini-PC using Via's 1.0GHz Nano U1700 processor. The Shuttle XS29F is said to feature both VGA and DVI video outputs, up to 4GB of RAM, SATA 2 storage options, four USB ports, and total power consumption of less than 50 Watts.