So, who has got the lowest hardware running a "production" drupal site?

Thats what I thought now my old reliable pentium 166 with 160 MB mem will be replaced by a "newer" old machine. With more than 6000 nodes on a drupal 4.5.1 site, 150+ users and more than 100k hits per day (about 4k pageviews) and lots of other processes (iptables, DHCP, mail, DNS etc) I think this machine will rank rather high.

What kind of hardware are you running for our production site? And can you "beat" my old server?