What will be the next big thing online? And how will it change our lives? In the Digital Giants series, the digital world's top thinkers share their visions of the future with the BBC.
Martha Lane Fox, co-founder of Lastminute.com delves into web entrepreneurship and some of the difficulties facing online businesses in the UK.
Digital Giants is part of
, a season of programmes on TV, radio and online exploring the extraordinary power of the internet.