The Flowchart Lie (a comment on Ingo Rammer's technote)

Ingo Rammer's current newsletter has an excellent technote on 'The Flowchart Lie'. The subject is about transactional business processes and how they are deployed. Ingo emphasizes the need for messaging systems to communicate between web services. (I call it 'musical conducting' :-) I am grappling with a similar issue while building collaboration systems (e.g., Groove & SharePoint). Collaboration processes are non-linear in nature and its context must be maintained in its entirety - call it 'gestalt' and slicing it as series of 'transactions' does not work.