last night i took my first decent planetary image. using my 10" f4 newt with a 2X barlow i was able to snap this shot. i should be able to get much higher resolution with my 5x powermate but the lack of a filterwheel and horrible backlash in my mount makes it quite difficult.
I thought i would add this one as well, it is only black and white but it shows Ganymede and Io in close conjunction and both of their shadows are visible on Jupiter.