Mr. Startup: Paul Graham, founder of YCombinator, and his "no asshole" rule

YCombinator, over the past couple of days, has had nearly every major technology investor and press person visit its Mountain View headquarters to witness the birth of 36 new startups. He explains what YCombinator is, then have a short conversation with me about the companies that revealed themselves for the first time yesterday. One of my favorite parts of this conversation is when we talked about his "no assholes" rule.