I wanted to post a draft copy of the submitted paper here as I had promised, so here you go. I am currently reworking this paper based on the comments received when it was submitted to BPM 2008. Comments are welcome!
I should mention that I plan to test some of the reworked content in a few upcoming speaking engagements, such as the LinuxWorldExpo and at ATOS Origin's Open Source Expert Group event next week. I will post more on these as they happen.
UPDATE: removed old draft copy, please see CAiSE 2009 posting where this paper got reworked and accepted.