What is your *oldest* (or if you have a bunch of elderly servers list them
all) server still in production & why?

I will start out with 2 of my many elderly servers -
Dell Poweredge 2200 purchased 2/10/1998 - intranet server, dotproject
Dell Poweredge 1300 purchased 9/8/2000 - windows 2000 terminal server,
openfire, payroll (yeah, payroll on a server that old).

Why? $0/budget for IT, but everyone's desktops are 3-4 yrs old at oldest,
most less than 2 yrs old (mgmt approval of course).