Here goes.
 1 Dell Sc1420 Server (2.8Ghz Xeon, 3Gb Ram) - Windows Server 2003 - 
Websphere Dev Validation/Test System
 1 Dell Sc1420 Server As above                          - Centos 4.4 - 
Websphere Dev/Test System -
                                                                              
VMWare Server (SUSE, Solaris 10, Server 2003 or Centos 4.4)
 1 Homegrown 2.8Ghz Xeon, 2Gb Ram               - Windows Server 2003 - 
Main App Dev System
 1 Homegrown 1.86Ghz Dual Core 2Gb Ram      - Fedora Core 6, Core 7 Test 
or Centos 4.4 - System being built at the moment.
 1 Dell Inspiron 8600 Laptop  2Gb Ram              - XP - General 
Workhorse - Main Photoshop System - Dual boots with
                                                                           
- Centos 4.4
 1 IBM Stinkpad T43P 2Gb Ram                        - Windows Server 
2003 - Db2, Oracle, Websphere
                                                                             
(MQ, WBI, Process Server, MQe etc)
1 Sun Server 1000, 4Gb Ram                             - Solaris 9, Sun 
Dev Box - Keeps my garage worm in Winter.
1 Apple Mac Mini  (PPC)                                   - Fedora Core 
6, Subversion & Bugzilla Server
The two laptops enable me to have a luggable develoment system when I go 
on Customer visits.
Bear in mind that I am a professional Software Developer who works from 
home. (I have been working for the last year on the extension to the 
London Congestion Charging System.)
The Dell SC1420;s are interesting. The run RHEL, SUSE, Knoppix  and 
Fedora Core without problem. They refuse to correctly load Ubuntu at all 
(X does not start). I think I might set one up at the next meeting and 
issue a "Get Ubuntu working on this system). Note that Ubuntu works in a 
VMWare environment on this system. The graphics card is an ordinary 
Nvidia 5200 which is not exactly exotic.
Stephen D