okay, here's a quick tutorial for photoshop 7.
1) make a new document
2) press "d" to reset the colors
3) filter -> render -> clouds
4) filter -> sketch -> chrome (mess with the settings a little bit, i used detail 10 and smoothing 0)
5) filter -> sketch -> bas relief (the settings i used were detail 15, smoothing 4, and light top)
6) filter -> blur -> radial blur with the zoom setting to 100, quality best. i did this twice.
7) press control-u, check "colorize", and slide the hue/saturation until you get to a color you want. click ok.
8) filter -> stylize -> glowing edges with the settings on edge width 2, edge brightness 6, smoothness 5.
9) press control-u again, but this time do NOT check "colorize". slide the "lightness" bar up to +8. edit: and REDO THE COLORS, missed that part the first time, sorry folks.
10) filter -> pixellate -> mosaic with a cell size of 2.
you're done