My own liking for a docking station (which should ideally be portable enough to use on trains etc) would be: a few USB ports (2-4 would be sufficient) built-in USB ethernet (and possibly serial) power connector which charges the docking station's batteries as well as the 770's pass-through for headphones VGA out would be fantastic if possible (are there USB -> VGA interfaces?) Built-in stand for propping the whole thing up Slotted in 770 with some kind of restraint to keep it in once docked. A larger unit which allowed the inclusion of a 2.5" laptop HD connected over USB could also be very interesting.