Thanks to everyone who came out. As promised, here is the reference list.
The Trivium: The Liberal Arts of Logic, Grammar and Rhetoric Sister Miriam Joseph, Paul Dry Books (in particular, the chapter on fallacies)
The Breakout Novelist By Donald Maass
The Elements of Style (Illustrated) by Strunk, White and Kalman
RWA Chapter Listings (check individual chapter websites for on-line workshop listings)
The Persuasive Narrator by Roy Peter Clark, May 23rd, 2006