Here's mine. I like to keep it nice and simple with good contast and well-labeled items. Notice that my wallapaper is a picture taken through a microscope of the markings on an old AMD chip.
P4 2.4C @ 3.44Ghz , 285 FSB -- Asus P4C800-E -- 512 Mb Corsair PC4000 -- Radeon 9800np 445.5/398.3 Vmodded-- 2xRaptors in RAID 0 -- Watercooled CPU, GPU and Northbridge -- Handcrafted Case