phys.org had an article with some research on optimal plane boarding [1] describing what seems to be another alternative, sadly sans the infomercial.
One thing I find curious about all of these is that they assume back-to-front as the baseline. I've never ever seen a plane being boarded in something resembling an ideal back-to-front. On most flights it's basically a random pounce where the stewards try to keep some sequence but usually fail. I tend to have a small carry on and just sit it out until most everybody has boarded, regardless of my seating.