Not the best looking or most advanced social networking site on the web, but by far the biggest and most diverse. Boasting over 100 million users you're likely to find a fair few people you know on this behemoth. Easy to use and endlessly customisable with a little HTML knowledge or help from the myriad of websites dedicated to the task, MySpace currently dominates this sector.

Every band worth a look and thousands not have a MySpace music profile and the site has recently diversified into video and comedy. With Murdoch's takeover expect this site to grow and grow but it's bound to peter out eventually. For the moment it's still free and pretty much coping with its traffic. If you haven't got a MySpace, why not?