Workflow is just a Pi Process (1.5 MB PDF) via Manageability:Why ReST is Better – Part 5 – Self Descriptive State.
I’m going to have to read this again (slowly), as it introduces a new term – Pi Calculus – and a old chestnut – workflow.
See Hula, open source mail and calendar server, and GroupWare bad. for Jamie Zawinski’s (of netscape fame) “GroupWare bad”. Or for a counter claim consider Microsoft’s assimilation of Groove Networks (a p2p collaboration tool) and Ray Ozzie (creator of Lotus Notes) as MS new CTO.