I added the superstate and process state nodes to appear in the graph pane, but indeed the functionality is still very limited. The reason I added them was to overcome the nasty bug of the editor crashing when these nodes were added in the source pane.
Stay tuned for improvements. The support for these nodes will become better as we go.
I will work on a feature list.
I am lucky that this ugly exception is gone in 3.0.7... Nice work :-)
3.0.8 will even be nicer... Finally double click support and context menus in the graphical view :-)
And support BPEL? :-D