Strangely, I just saw a PocketWizard Promo where the guy had three flashes on a bar with an umbrella. I think at that point I would have used a battery powered strobe.
Yep, more speedlights equals more light. They even sell a quad setup. Of course, that is $2000 for one light setup and that does not include stand, modifier or battery packs! No thanks, I can buy a set of AB1600s, modifiers and generator for that much money.