Actionscript 2D Physics Engine : pEngine

In response to my review of the available Actionscript 2D Physics Engines I received a comment from the YAAB (Yet Another Actionscript Blog) regarding a 2D Physics Engine they are working on called pEngine. This engine is a port of the Chipmunk engine from C. At the moment there are some interesting looking demos and not much else. But if you are interested in Flash physics it may be worthwhile bookmarking the YAAB feed.