The partnership we're announcing today will make instant messaging an even more valuable part of users' lives.

There's a big difference in doing it in scale and in respecting users' privacy. When you do this with 250m people or more in multiple languages, you really want to make it secure.

Textbook rental is a great concept. It is just a great business model.

Guitar Hero has been so successful that a lot of people were questioning how it was possible to innovate on the most successful franchise of its kind.

What Guitar Hero has done is to turn music inside out. Whereas the iPod made music very personal, very singular - you put your ear-buds in and you listen to it - Guitar Hero turned it around and made it very social. So it is fun to play. It's fun to play against people.

I've been extremely fortunate in my life. So I actually believe that I'm the living embodiment of living the American dream.