That would be pretty damn slick, but I don't know about actually spelling out the words like that... I think the sharpened arrow, like on the down button in the second pic would prolly be best for all three triangular buttons. Maybe I just like the way symbols look better than words, and well, they're more universal too I guess. Actually, maybe they should match the standard FF and RW symbols? Isn't it like >> or something? (I can't remember, and I don't have a stereo handy right at the moment)
Oh yeah, and for the knob, just keep in mind that it spins, and so you might want to keep it plain, or use a symbol that pretty much looks the same at any angle. Like a top view of a speaker or something...? Dunno.
_________________________
DarioMK2 in an Impreza 2.5RS