Thanks Bill & janok!
Spike, my first impressions are that it is another tool for the toolbox. There are some shots HDR works better and some that the Luminosity masks work better. Ghosting for example has no compensation using masks unless you are going to completely rely on one shot for the area where there's movement, which may not be possible without a lot of cloning. On the other hand there are no halo's produced going the LM route. There are other issues too with contrast and other things. It's definitely not as simple as his example would imply. That said, he does offer some really neat tricks and I suggest thoroughly exploring his web site.
Gene, I've played with so many shots to this point, I honestly don't remember how many it was, but it was less than 7. I'm guessing 4 or 5. The more you use the better the range obviously, but the more problems you create with contrast. It may be that 3 is the magic number and that it wasn't an accident that's what his example had.
Thanks Tyler. I LOL'd when I read your post. Email me your list and I'll see what I can do. 