A company out of Bangkok (NorhTec) started last year with a microPC running the following specs...
Fanless Design
VESA mounting support (as depicted at right)
Processor -- SiS 550 166Mhz x 3IUs
Memory -- soldered-on 128 MB SDRAM
Input/output ports
IDE
10/100 Mbps Ethernet
3 x USB V1.1
Optional RS232
Expansion -- CompactFlash slot
2.5-inch hard drive mounting
Ultra-low power
PXE diskless boot
That\'s right folks, Ultra-low power means 2-8 watts (that is less than a flourecent light bulb and 10-20x less than a regular household lightbulb).
Using a stripped down version of Linux, the machine was able to boot up off of Compact Flash and connect to the internet in ONE MINUTE. Measuring in at 4½" square the NorhTec\'s MicroClient Jr. is extremely lightweight, compact, and... fast (relatively speaking).
Now the company has outdone themeselves and have machines that are running up to 1GhZ fanless with 3 USB 2.0, 2 10/100 BaseT ports and more.
They have a full array of products on the market ranging from the MicroClient Jr (listed above) to products that can serve as workstation replacements (Windoze compatible).
I do wonder as I look over their range of mini/micro products why they have not developed laptops (all their products do have VESA to plug in an LCD monitor) that would weigh less than 4 pounds and go for miles and miles on just one battery.
This is definately a company to keep your eye on.
Check out their web site:
http://www.norhtec.com/index.html