If mom comments on your photo, it counts less than if a stranger did.

Flickr was designed partly to market itself. There are a lot features, in place early on, that let people take their photo, upload it to Flickr and post them elsewhere, on their own Web site or their blog, which meant a lot of incoming links.

The first less is this: take it from me, every vote counts.

Those moments of play that we do get in meta-life, like playing music, or golf, or word-play, or flirting - those are some of the best parts about being alive.

Email has the virtue - sounds like a bad thing, but it's the virtue of being the lowest common denominator messaging protocol. Everyone can have it. It can cross organizational boundaries. No one owns it. It's not some particular company's platform.

The scale of revenue growth is unprecedented. If you look back over history, whether you're looking at the railway robber baron era or the 1920s or the '50s or the '70s, it used to take a long time for a company to get to the point where they had tens of millions of dollars of revenue. It was almost never an overnight phenomenon.