This week I upgraded my firewall and, inherently, this site Rembl.org. The old site was running on Wordpress 2.0 and an AMD K6-2/300 with 96 MB memory and 4 GB harddisk. I bought a surplus Compaq Evo D500 - P4 1.7 GHz with 512 MB memory and 20 GB harddisk from www.2dehands.nl for a nice price and upgraded to Wordpress 2.3.
For further details see phpsysinfo and below you see a picture of this machine.