Finance and Theoretical physics
Finance: Many of us know a few things in finance, but none of us know it all and I'm willing to bet most providers like me know very, very little comparatively.
Advice from covered calls to saving and investment portfolios for those of us interested (and I'm very, very interested.)
Theoretical Physics: OK seriously we HAVE to get this one. I want to have awesome discussions and learn theory's I've never heard about. We spend so much time here, I present we have a forum for something not many of us would have much contact with if we didn't watch SciFi. Fuck me with math TNTangie!!!!