How many people here would be interested in forming a virtual book study group, to work through Jaynes ?

There already exists (an extremely low-traffic) mailing list with that mission: etjaynesstudy@yahoogroups.com

Note that the objection that an existing mailing list would be populated by people who have not been exposed to Eliezer's writings on rationality does not apply here because (1) the current population consists of only a handful of people and (2) what I have seen of the current population over the last 3 or 4 years is that it consists mostly of a few people posting (relevant) faculty positions and conference announcements and experts in Bayesian statistics.