Another differentiator is that Skype is free and simple to set up, and it costs us virtually nothing for a new user to join the Skype network, which is why we can offer the service for free.

Another differentiator is that Skype is free and simple to set up, and it costs us virtually nothing for a new user to join the Skype network, which is why we can offer the service for free.

We have 2 million users in the U.S. and about 13 million worldwide in more than 200 countries.

In fact, we just surpassed our first 1 million simultaneous users online.

If you can use a Web browser, you can use Skype.

With our work at Kazaa, we began seeing growing broadband connections and more powerful computers and more streaming multimedia, and we saw that the traditional way of communicating by phone no longer made a lot of sense.

It is very similar to companies like Google and other internet companies. When you go and search on Google you don't pay for that. But sometimes you click on an advert and Google makes money on that.

Then people started using it more and more and it became the most downloaded software on the internet.

If you could utilize the resources of the end users' computers, you could do things much more efficiently.

Skype is easy enough to use so that people don't need to be tech savvy - a lot of users just want to communicate with their friends and family, and they find this is the easiest, cheapest way.

We have just started, and if you compare the number of people using Skype to the number using a telephone network around the world, we're still just starting.

Skype is for any individual who has a broadband Internet connection.

What we are doing is taking advantage of the broadband Internet to provide basically unlimited free calls to anyone at a higher voice quality than they can with the phone lines.

We also have a conference call feature where up to five people can talk on one Skype call.

When radio stations started playing music the record companies started suing radio stations. They thought now that people could listen to music for free, who would want to buy a record in a record shop? But I think we all agree that radio stations are good stuff.

They also can combine voice with instant messaging and online file sharing.

People need to access Skype wirelessly, no matter where they are, and what happens is that we'll be taking advantage of the rollout of Internet everywhere - WiFi and WiMax in particular.

And the VCR did the same thing: the movie industry thought nobody would ever watch movies any more.

The telephone is a 100-year-old technology. It's time for a change. Charging for phone calls is something you did last century.

Angry Birds is one of the fastest-growing online products I've seen, growing even faster than Skype, and the company has done a brilliant job of extending it across different platforms and merchandise.

As an entrepreneur, if you're the originator, you need to be faster than ever.

As an investor, what we're not looking for is 'oh this is a cool app,' it's 'is this something that can become a big business?' You need to find those that can become real businesses.

If you want to be an entrepreneur, it's not a job, it's a lifestyle. It defines you. Forget about vacations, about going home at 6 pm - last thing at night you'll send emails, first thing in the morning you'll read emails, and you'll wake up in the middle of the night. But it's hugely rewarding as you're fulfilling something for yourself.

It's extremely hard to build a company with a product that everyone loves, is free and has no business model, and then to innovate a business model. I did that with Kazaa, had half a billion downloads but that wasn't a sustainable business.

Surround yourself with smart, dedicated people - to build something isn't a one-man show. It's more important to have smart people who really believe in what you're doing than really experienced people who may not share your dream.

When we look at investing, we always think about 'how defensible is this, how likely is it that somebody is going to copy this.' E-commerce tends to be something easy to copy because it's execution.

When we started Skype, if you look at analyst reports, no one forecasted it as a big business. Also when Google started, it was not fashionable to be in search. It's not trying to do the obvious - that's the hard part.

Silicon Valley is the best place to start a tech company in so many ways.

Video is moving online in a big way. It's proven to be a challenging market for some companies that start out as a pure Internet company such as Joost.

In the earliest days, this was a project I worked on with great passion because I wanted to solve the Defense Department's problem: it did not want proprietary networking and it didn't want to be confined to a single network technology.

I don't think I could ever do a network sitcom because the humor is often based on some trite circumstance. I don't want to be a part of a show where it's mostly about coming up with the jokes.

Parents should watch what their children watch and not use TV as a babysitter. If a show is objectionable they should turn it OFF. They should write the president of the network and tell him they are never going to watch that program again and why.

At this point, I can't say what network would be picking it up, but I know that it would be a success.

Another differentiator is that Skype is free and simple to set up, and it costs us virtually nothing for a new user to join the Skype network, which is why we can offer the service for free.

As far as Zarqawi is concerned, there is a network of extremists; it's not just Zarqawi.

If you just have a single problem to solve, then fine, go ahead and use a neural network. But if you want to do science and understand how to choose architectures, or how to go to a new problem, you have to understand what different architectures can and cannot do.

If it's the Psychic Network why do they need a phone number?

They're pretty particular about what they show. They certainly edit the scripts and have conversations with the writers about what they are and aren't willing to portray. But the writers and the network are pretty much on the same page.

My goal was to be a network correspondent by the time I was 30.

The point is not to stay marginal, but to participate in whatever network of marginal zones is spawned from other disciplinary centers and which, together, constitute a multiple displacement of those authorities.

But despite the universality of URLs, we often forget that they're not just a handy way to address network resources. They're also valuable communication tools.

I have two syndicated radio shows though United Stations Radio Network.

The local communities, through their leaders, were able to build a communications network that allowed my work here to reflect the needs and interests of the people within the 9th Congressional District. It's been an honor to do that and we did so successfully.

A society deadened by a smothering network of laws while finding release in moral chaos is not likely to be either happy or stable.

So, we come out to Los Angeles. And we met with every network. We met with show runners, directors, writers, everything. And what we had an idea for, they didn't like. And what they had an idea for, we didn't like. So, we went home.

The old boy network is still very strong and very true. Just look at the stock exchange and how many men and women are there. It is still very much run by men.

I wouldn't totally rule out doing Letterman or the Tonight Show if I had a set that I just happened to write that I thought was funny but was still appropriate for network censors. But I'm not going to go out of my way.

We had more viewers on the broadcast network than we did on the cable channel.

At MIT, I had the good fortune for seven years to teach network theory, which is basic to many disciplines, to one-third of the undergraduate student body. It was an experiment to see how high we could bring their level of understanding, and it exceeded all of my expectations.