I asked Tom the same question today. It turns out that he is still working on it. Stay tuned, the chapter is already in CVS. It will certainly be included soon.
Can you give me a brief overview of what this capability is so I know if its what I am looking for?
Basically, I am interested in propogating tokens simultaneously after a fork. Using nodes, it seems that one path of execution will go all the way to the join, then the other path. I want both paths to execute asynchronously. I can do it using states, by signalling each token step by step.