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.

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

This is good for consumers; it's just a lot harder to do when you're flying an airplane as fast as these companies are flying and you want to change the engine at the same time. We have to get it right.

When we give up our rights that we have in the Constitution to privacy, to know that Big Brother is not looking over our shoulder, we give up a valuable entity in this country.

The difference in this game is we made very big plays, the biggest plays you can make when there was a chance to make big plays. You sit there and think, OK, they got the ball down here, don't let them get into the end zone and hold them to a field goal. Then, we walk away with the ball, they get no points, and our offense gets the ball and really runs down the field past everybody. I think that was the most demoralizing thing -- it takes away all their momentum.

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