[Willie Myers]

the old rule of thumb used to be never put *any* non music/audio apps on the Mac that you make a living with. and there's good reason that old rules of thumb have become old rules of thumb.
but these days, I think it's more and more common to see additional apps being used on "the mothership". I do a bit of movie stuff (iMovie, iDVD) on mine as it's got the horsepower (proc. speed, RAM, big fast drives, etc.) that I need for movies. just be *very* careful because tossing that seemingly harmless little app or demo can crap up an otherwise rock-solid DAW.