I started with a Pentium 1 200mhz with 8MB RAM, running Apache along with PHP4 and Debian Woody. Wrote my own blog on that machine.
Started running more and more services on it, e.g. IRC server, file server, print server, DNS server. Later on, I upgraded my deskop and turned my old AMD K6 300 into my router.
Wish I had blogged about the things I had done on the blog that I wrote back then.