Perusing the web, and found a host of interesting pages on action theory (most of this list was swiped from other action theory links lists, but I have distilled from them what I considered to be the gems):
Action Theory: Introductory site which aims at providing resources for people interested in action theory in philosophy and cognitive science
Action Theory Page maintained by Andrei Buckareff: very extensive page that includes a collection of recent essays & articles, a list of links, and a list good graduate programs specializing in action theory
The Garden of Forking Paths: A blog devoted to Agency Theory, including related issues in Philosophy of Action, Moral Psychology, Metaphysics and Ethics
Papers on Agency and Related Issues: a blog tangential to The Garden of Forking Paths
The Determinism and Freedom Philosophy Website: excellent and extensive site that includes important pieces central to the free will debate
Any other suggestions for this list? Let me know!