It's not that knew, we talked about it on AT a while ago, as far as I know nobody has actually tried it though. I don't go there very often any more so maybe someone has tried it by now.
I know I never will. It sort of looks like a way to make the WB more complicated. I'm not a big fan of the WB, why would I want to try a more complicated version of it?
I think I would shoot off a flipper rest before I tried something like that personally.
Paul