At Twitter, mobile is in our DNA ... For us, it's all about mobile, and it always has been.

This idea that the open exchange of information can have a positive global impact is being proven over and over again around the world nearly on a daily basis - and for Secretary Clinton to recognize that, I think, is a huge step.

When you think about Twitter, there are people all around the world reporting twenty-four seven, every second. They're reporting what they're seeing and what's happening around them. So there's a lot of potential for breaking news.

Understand that you dont have all the answers, you just have to start somewhere and keep an open mind.

With Twitter, it's as easy to unfollow as it is to follow.

I think of Twitter as a messaging system that you didn't know you needed until you had it. Think about when cell phones first started coming out. People said, "Why would I carry my phone around?" And now you'll drive back to your house thirty miles if you forget your cell phone.

What if the New York Times gave out free, cheap Kindles to everyone and said this is how we're doing it now. You know? Maybe that's a way to go. The technology gets cheaper and cheaper, and at some point it has to be cheaper than all these trucks and all this gas, to just say, let's give away a Kindle to everyone.