I see no problem with allowing the non-flying pilot to taxi from the LHS. I have taxied the aircraft countless times from the LHS completely incident free. The controls and the brakes still work the same and the view perfectly suitable. In fact my cojoe taxied around plenty today without problem.
The only concern is the inexperience (usually...not always) of the cojoe. If they are new to wheels they tend not to be as alert to the lean the aircraft can develop, and the potential for rolling. Additionally I have found some guys will taxi too fast for conditions, such as icing and snow.
As for the incident mentioned earlier with the 76 rolling over; I read the same report a couple of months ago on pprune and was amazed that it managed to occur at all.
The cojoe reached over to apply the park brake and yanked the collective on. This is bizarre due to the fact that the collective has a magnetic brake holding the control secure until a button is depressed on the handle of the collective. Its also strange that the cojoe mistook the collective for the park brake. Back to basics there.
Try this version of helicopter twister.....a fun game for all the crew.
Sit in the LHS. Depress the LHS collective trim release, push on the toe pedals and reach over to haul on the RHS collective. <img src="rolleyes.gif" border="0">