Bald & GLV,
The presentation techniques for MOB or SOB are different, but both can be done safely. As I mentioned in my first post here, the shooter must be especially careful druing the presentation to not "paint" themselves or bystanders.
While the original MOBers may have been innovative (not necessarily ignorant..) people with left handed holsters, many companies have offered true MOB holsters, including Galco, which have the "proper" tilt for presentation from that position.
Personally, I think MOB might be the MOST uncomfortable way to carry a gun, though I do prefer my IWB holsters to sit further back the normal sometimes, especially when I'll be standing for an extended period.