Marc, first of all, beading is not necessarily a sign of protection. NXT loses it's beading ability fairly quickly, which often leads people to believe that it's no long there. I have it on the down low that Meguiar's is in the process of changing the formulation of NXT because of this popular opinion. There is a school of thought that beading is not really such a good thing because tight beads of water, if left to sit on the paint, tend to concentrate certain contaminants that can be harmful to the paint. Anyone who's ever had high mineral deposit water spots actually etch into their paint understands this.

Otherwise, can you wax too often? No, not really. The greatest risk you encounter is that the more frequently you "touch" the paint the greater the risk of inducing swirl marks. If you're not seeing swirls then your technique must be very good. I say wax to your hearts content.

Oh, and come spring time, if you decide to wash/clay/polish/wax don't bother using Dawn to strip the wax. The act of claying and polishing will remove any wax that was there to begin with, and Dawn is not really the best stuff to wash a car with anyway.