This is really interesting, does anyone have references to the stuff stated here? I'm trying to read through the stuff from his website:
http://bayes.cs.ucla.edu/jp_home.html
Video lectures has a workshop from NIPS '08 with talks by Pearl, Spirtes, et al at http://videolectures.net/coa08_whistler/
The UAI and NIPS conferences are a common venue for this research to be published in if you're interested in the latest results.