So I acquire an old HP Celery 633 for free, which had been incredibly useless under WinME (surprise). So I figure, lets toss Fedora Core 2 on there, and see what we can do with it. Well, after loading it up with IRC, FTP, Samba, CUPS, BIND, Apache, FBMUCK (just to prove I could get it working), and most importantly Webmin, its still chugging away, and has been for four months, without a single reboot. No keyboard, no mouse, no monitor, just OpenSSH and Webmin. $10 UPS guarantees no power spikes will affect it, and oddly enough, this cheap pile has a BIOS option for auto-power-on-after-power-fail. After realizing just what a hog Gnome is, its default is now runlevel 3 (no GUI). The lack of monitor makes X completely irrelevant anyways, since this isnt for workstation use. It's attached to my LaserJet 5P, which Samba happily shares on the network. The FTP directory is also a local share on Samba, so I only need an FTP client when not on my internal network. And it all just works. I love that part.
I've tried Win2k3 ES before, and it chokes just running IRC on a 1.7ghz Athlon. The at least-weekly reboots werent much fun either.