Quick bulletin that I'm working on porting Erin's recent changes to Box2D, which will eventually become the bulk of 2.1. It's a pretty big job, which I'm doing at once, so there'll be nothing compilable for a while. I've done maybe 10%.

I have a few changes planned for 2.1 beyond mirroring the C++. Box2DFlashAS3 will be breaking compatibility with the C++ and backwards compatibility in both API and implementation.