Thanks! Finally had a question worth the asking that couldn't be easily answered by a book.
BPMN might be overkill for my current project, there will be very little automation involved other than shuttling content from on person to the next through the various stages of completing documents.
I think the powers that be would be happier if I just stayed with Visio, but I still need to know this stuff for my own good. I had some epic battles with Information Architect a couple of years ago, and I'd rather go with something a bit more than Visio, but quite a bit less than IA.
BPMN with training wheels is probably the right level of complexity required.