Just released a new version of the physics plug-in

It includes a few bug fixes and some new features, the main one being the fact that you can now change physics shapes at run-time without having to delete and recreate the physics object.

There's been a bit of a redesign internally to make it play nice with the visual editor - in fact, it's now fully integrated with the visual editor (as of version 2.1 of the visual editor). The API hasn't changed though, so if you have a project using the older version it should be safe to just switch to the new version and everything should work the same, minus some bugs.