Ya, I really appreciate all the work your doing too lordcrumb. My twins will be born tomorrow at 9:30am... so I might not be able to look at your work for a week or two. It's good though to have others see the results and add their thoughts :)

The only thought I have, is that you could put a cap on points lost. Nothing worse than having a single game where you don't perform perfectly and losing most your points.

It would be so awesome if you could make the formula look like the Tangens hyperbolicus
http://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Hyperbolic_Tangent.svg/490px-Hyperbolic_Tangent.svg.png
I mean you are at 0/0, the x (right) axis is the opponents rating compared to yours, and the y (top) axis is the amount of Rating you will win or lose. This way we get a cap to the Rating win/lose, and playing against people with slightly better Rating will be the best farming for you own Rating.