I've been busy adding physics to the scene graph and editor. There has been some success at dragging and dropping physics entities, rigid bodies, and assigning meshes to them. Complex physics entities are now constructed from the scene graph but I haven't added any joint nodes yet. I wasn't sure if I needed a separate tool to do this, but it seems to have worked out fine and it's very easy.
The editor has a few bugs that need to be fixed. I plan on adding more node types such as water, ground plane, cloth, global scene properties, and joints.
Today I am looking at the FBX SDK and going to see how easy it will be to make a converter.