Thank you for posting the link Frank. I have been wondering about the applicability of the workflow API to a number of desireable future developments in OpenACS. It is nice to see some development going into it that can be rolled back into the toolkit.
I don't know if anyone is actively working on workflow related things at the moment but I know that in the fullness of time I myself will be looking at how the workflow facilities might be able to help us with some new functionality.
Regards
Richard