Software companies should take more responsibility for security holes, especially in browsers and e-mail clients. There are some straightforward things the industry should be doing right now to fix things, and I don't know why they haven't been done yet.

The more you enter, the more you become locked in. Your social-networking site becomes a central platform - a closed silo of content, and one that does not give you full control over your information in it. The more this kind of architecture gains widespread use, the more the Web becomes fragmented, and the less we enjoy a single, universal information space.

The Web is now philosophical engineering. Physics and the Web are both about the relationship between the small and the large.

The challenge is to manage the Web in an open way-not too much bureaucracy, not subject to political or commercial pressures. The U.S. should demonstrate that it is prepared to share control with the world.

Web users ultimately want to get at data quickly and easily. They don't care as much about attractive sites and pretty design.

One of the issues of social networking silos is that they have the data and I don't.

People keep asking me what I think of it now that it's done. Hence my protest: The Web is not done!