Equity capital is expensive. Every time you do a raise, you dilute.

There is a difference between hiring a CEO and turning over control of the business.

The more entrepreneurs in the world that are getting their ideas financed, the more great companies there are going to be that we can all invest in.

If you have a native monetization system where the atomic unit of content is the ad unit, that scales down all the way to a small screen experience. That's why Twitter is performing so well on mobile.

Customers are a great way to finance a business for many reasons. First, customer financing is typically non dilutive. They want something from you other than equity in your business. Customers also help you fit your product to the market. And customers will help debug and improve the quality of the product.

I'm really interested in the intersection between reputation, identity, and knowledge.

Foursquare's adoption of a game dynamic when it launched is a particularly clever implementation of a social hook.