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

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

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.

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.

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.

Look for when the environment is changing – the big shift now is mobile Internet. It’s really happening big-time. The way you interact with services on a smart phone compared to the Web is quite different, so there’s a huge opportunity.

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.

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.

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.