So, for me, working with larger companies has often been very satisfying, precisely because of the ability of bringing critical mass to bear on a given effort.

Henry Kissinger once told me he was very concerned about the Internet's impact on people's ability to absorb information in a concentrated way, because we've become accustomed to looking up something, getting a snippet and being satisfied with that - as opposed to reading through and considering a weighty tome that goes into great depth.

Although I've had several major career changes, I was extremely hesitant about making some of them.

There is a project that's underway called the interplanetary Internet. It's in operation between Earth and Mars. It's operating on the International Space Station. It's part of the spacecraft that's in orbit around the Sun that's rendezvoused with two planets.

I am delighted to invest in JetSynthesys and join the Board as Non-Executive Chairman. JetSynthesys aims to become the platform of choice for digital content and experience. We have invested extensively in backend technology infrastructure that is best in class in the world.

I have the Sony Reader; I have the Kindle as well. I don't really use either of them, to be honest. I'd rather sit down with a cup of coffee and a newspaper than read all my digital books.

I like to say StumbleUpon provides a personal tour of the Internet. The responses are more targeted to your interests than they would be with a regular search engine. If you choose a topic on our site that you're interested in, such as art, Web sites related to art appear, as if you're leafing through an art magazine.

I have nothing to do with Facebook or the Internet - I don't know how to use half of it; I think I'm better off.