I felt I had to write this. I might be getting stuff wrong. I'm pretty confident that I'm not (I have followed many discussions on the subject with great interest, taking notes), but if I am, please let me know.
I put it up on lulu (link should be right-click, save as), because I didn't know where else to put it. If anyone wants to host it elsewhere, feel free, just drop me a line. Same goes for re-writing it or expanding on it. It's not scripture.
I hope it will be useful.