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.

The next Google or Facebook will come from somewhere other than Silicon Valley.

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.

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.

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

I hope that my investment into Atomico will become my best financial investment to date.

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.