THEORY: Feature geometry for uvulars/pharyngeals

Hey, linguists and well-read amateurs:

I've been poking around for a while, and I'm really stymied trying to find
out how to fit uvulars and pharyngeals into a feature geometric system.
I've gotten a couple of fragmentary descriptions from here and there, but
nothing very conclusive or helpful. The best I can get is that there's two
possibilities:

A privative feature [pharyngeal] under the Place node (but what about
distinguishing uvulars from pharyngeals?).

A Guttural node that dominates Larynx (specifying voice,
spread/constricted glottis, etc) and Tongue Root, which somehow works to
specify ATR and pharyngeality.

I'm pretty frustrated here. Answers or links to web resources are greatly
appreciated.

Jesse S. Bangs jaspax@u.washington.edu
http://students.washington.edu/jaspax/
http://students.washington.edu/jaspax/blog

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