It ran on a really old PII-450 machine, that had 512mb ram and a 40gb hd crammed into it.
I have a line on a Compaq PIII Deskpro that is free. Little bit of a step up.
I like to use old business grade desktops for my servers. The reliability is a little better then a consumer grade machine. Just did not expect the old beast to die when it did, I had been kicking around getting a new machine anyway.