[font=trebuchet ms]Another thing to keep in mind is that a power chord usually has the same note sounding on several strings, which makes it sound full. A 'blatant' example - fret the A string on the 7th fret, and the D & G strings on the 9th fret. Double everything! And this shape is very moveable, though you need to mute the low E sometimes, and selectively pick the rest.

I picture a wide-eyed grin the first time you try that through a cranked amp![/font] :D