One of the things we urge Y-Combinator companies to do is to have profitability in grasp. If you need to get profitable before your A round of money, you ought to be able to do that.

All companies that grow really big do so in only one way: people recommend the product or service to other people.

Many of the companies in the mobile location space are trying to figure out different ways to tie what they're doing to commerce.

Being a public company is really terrible for most companies. I'd say Facebook and Google have done a pretty good job of standing up to the incredible quarterly pressure to hit numbers, but most companies - and I've observed a lot now - don't do a very good job of that.