Most people on head-fi use banana hangers. A certain paper towel holder that Ikea sells for $12 also works rather well. Larry at Headphile sells nice hand-built wooden ones, but at Headphile prices . Check head-fi, there's a bunch of threads on this topic there.
I personally put a hole int he walla nd use one of those oversized rounded thumbtacks made for the note boards. Not my current setup how they sat last year... (i have a limit of desk space if thats noticeable here, added speakers+other goodise since in new apt)
1.2ghz compaq somethin or other i was fixing for someone at the time; next to my old comp gutted (2000+ a7n8x-x) on top of an original dell optiplex gx1(whos monitor is the white 17" on the desk dual on main) sitting nex to compaq presario 1500us next to my current computer in sig but w/ audigy2 and 3000+ winchester(both of which i sold), and stock hs/f. sold the saitek gamers and the mx510 pictured there also..