DHH on how to make money online
DHH (of Ruby on Rails fame) at Startup School. He did a very similar presentation at FOWA Dublin when I was there this year, but this is a nicer, refined version with him side by side with his slides.
I loved his comment about there being "not enough people trying to make a nice Italian restaurant in the webspace."
Obviously, nothing earth shattering in here, but it is wise to keep it in mind in an environment where everyone is trying to hit one over the fence a la facebook, youtube and twitter.