The organized skeptical movement is aimed primarily at improving critical thinking among the general public. In LW terminology, this is about raising the sanity waterline about things like religion, astrology, and homeopathy. Given how much money is spent on such things, that's a useful goal even from a simple naive utilitarian perspective.
The talks from Skepticon IV are being posted to YouTube.
So far we have:
ADDED:
More to come soon, hopefully...