The VIA C3 based motherboards (usually in a mini-ITX form factor) certainly meet the "low-power" part of the needs. An EPIA 800 (C3 @ 800MHz, about the same computing power as the Pentium III you've currently got, more if you stay away from FP operations!) and modern IDE hard drive tick along at about 25-30W power consumption. A small RAID array of IDE drives will bring the power consumption up a few notches (add about 10-15W peak for each additional drive). There are rack-mount mini-ITX systems available, see for example http://www.caseoutlet.com/ My EPIA 800 webserver hosting about two dozen virtual domains (most but not all of them classic computing related) has survived a couple of slashdottings in the past 3 years without breaking a sweat :-). Tim.