Someone was asking a while back for meetup descriptions, what you did/ how it went, etc. Figured I'd post some Columbus Rationality videos here. All but the last are from the mega-meetup.
Jesse Galef on Defense Against the Dark Arts: The Ethics and Psychology of Persuasion
Eric on Applications of Models in Everyday Life (it's good, but skip about 10-15 minutes when there's herding-cats-nitpicky audience :P)
Rita on Cognitive Behavioral Therapy
Why are these considered inappropriate for people without a google account?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.