Hey, thanks. I've been looking for something to post in this thread, and now I have it. In general, the things posted in this thread are not a win for me, but this one is. If I were to revise my favorite D&D, removing all the different types of levels would be high on my list.
If it were not for games like True 20 or M&M (and the soon to be released W&W), I'd probably be working on an epic homeruled rewrite of 3.X that did exactly that...with other stuff, of course.