Intel Celeron D 2.53Ghz CPU
256Mb DDR RAM (under Windows I needed more, under Linux, I don't)
2x Seagate 40Gb IDE HDD's (identical, but one has a rubber shock protector sleeve)
256Mb nVidia GeForce FX 5500 \ GeForce 6600 (it's supposed to be an FX 5500, but it identifies itself as a 6600 and has the features of a 6600 such as support for dual monitors and a TV through DVI, SVGA and S-Video ports... shame it only runs 2 monitors...)
CD burner \ DVD reader combi (been meaning to fix that problem)
1x 15" VGA LCD from a HP Pavilion and 1x 27" LCD HDTV via DVI running at 1024x768 (I don't often use the smaller screen though)
Belkin PCI WiFi card supporting 802.11g
USB card reader, 2 thumb drives and a belkin Bluetooth dongle.
Microsoft wireless optical mouse (my other one broke)
Currently runs Ubuntu Dapper with XGL almost flawlessly following PHG's guide and if TwinView would clone the desktop rather than spanning (poorly), I'd use this to show off if I did computer trade shows again in the future (the big screen sat there demonstrating XGL and GNOME while I sit there with the smaller screen toying with it).