Shuttle K45 - 109 @ alternate
Intel Dual Core E2220 (2,4 Ghz) - 49 @ Forcom
2 gb memry I had here
And 2 times Samsung Spinpoint 1 TB at 92 each at alternate.

About running hot, not at all. The E6600 they used is one of the first Core 2 duo's. Consumes a lot more, as wel as older hard disks. Thing stays very cool here. More numbers later...

I installed windows XP by plugging in a IDE drive temporaly. This thing has no space for a regular optical drive, but has for a slimline. I don't need one....

In the PCI slot I installed a Linksys WIFI card.

Idle about 55 - 65 watt. "Stressed" copying data about 65 - 75 watt. That's more. But swapping to a single core low end Celeron would cut of 25 to 30 watt.

Installation is Windows XP SP3. Drives just connected, no RAID. I'll run some scripts that double copy crucial data.

It weight about 4 to 5 Kg, and fits a backback with my laptop in it. Thus transportable :) Certainly a lot bigger then yours. But it's faster and more options....

yup, if it doesn't have to be lugged around a lot, but needs some kind of transportability, definitely the better choice. Bring it to the LAN in April and ask for extra 1gbit port :D

already done :)

Interesting, how much energy can be saved by undervolting?

a lot, if he can underclock that E2200 to 1ghz or something with low voltage you can reduce it another ~10W

crap, you make me regret getting this NAS:) have been trying to get a better FTP server on it, the standard one is limited config wise, so I installed SSH server, after a bit of searching (a whole lot of searching to be honest) got vsftpd installed but after few hours configuration it doesn't do what I want to do, and my knowledge of Linux is too limited to solve it... now for $50 I could have had a WinXP with Serv-U or other easy to use FTP server and download/upload speeds 5-10x faster... crap.

check your standby power usage, 20W here when plugged in but system turned off ?

4 - 5 watt overhere

go figure :)

265Mhz max FSB on Shuttle... CPU has plenty of OC room
265x8 = 2121Mhz E1200