I came across this new physics engine, Matali Physics. It says it is designed for .NET/XNA, etc. and the features page state that it comes with a few niceties like camera configurations, controllers/AI, etc.
The developers are polish, and seem to have a bit of an oldschool background, since their other product is a Atari emulator. Wierd.
Retrotechtacular: Olivetti Net3
1 hour ago