Things were a bit slow this week. I got side-tracked doing some more performance tuning. The Joint code was not where it needed to be.
I've also just found a bug with collision detection. I'll be tracking that down over the next couple days. Once that is done, I'll be back to creating my Springs demo and then go from there.
I have decided I'm only doing 2 more demos after the Springs demo. Joints and something that involves many different things. If I don't limit myself to 2 more demos, I'll never get this thing released.