I have several toons, but really now my main is my lvl 70 priest on Duskwood. I spent several years collecting bits and pieces for my setup and thought I'd share it with you all.
My most prized part of my computer are my dual monitors. Found a pair of 22" widescreen Samsung 2ms monitors at Frys in Burbank one day and decided I finally needed to upgrade to something I would keep for a while. They really make playing WoW an awesome experience. The computer itself I built before I moved to California in 2007. It is a 2.8GHz Pentium D dual core, with dual EVGA nVidia 6800GTS video cards (a bit out of date but 512Mb video RAM isn't too bad) and 4Gb system RAM. I currently have two HDs in it with around 1TB of space for all my music and games along with 3 external drives for other projects. I very much prefer my wireless keyboard and mouse (Logitech VX Revolution) but I also have stashed somewhere around there my old IBM clicky keyboard that I use a good portion of the time.
The drink of choice is pretty obvious in this picture. Keeps me going as I work 5pm to 5am as a support astronomer while I am finishing my PhD. In the background you can see my TV which, when sitting in my chair, I can see right next to my left screen. This is my setup where I spend my time trying to avoid writing my dissertation. Ah, Procrastination, our love affair will someday come to an end.