I think a current policy debate has potential for better results, since it would offer the potential for betting, and avoid some of the self-identification and loyalty that's hard to avoid when applying a model as simple as a political philosophy to something as complex as human culture.
Since we've had some discussion about additions/modifications to the site, and LW -- as I understand it -- was a originally a sort of spin-off from OB, maybe addition of a karma-based prediction market of some sort would be suitable (and very interesting).
To whom it may concern:
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
(After the critical success of part II, and the strong box office sales of part III in spite of mixed reviews, will part IV finally see the June Open Thread jump the shark?)