50 most bizarre social networks

My family...

16. Geni
Family tree
Geni, pictured, is a service that facilitates collaboration with your folks to build your family tree. Fun to see how long you can stick with it before an argument breaks out.

17. Eons
I hope I die before I get old
Eons is aimed at the baby-boomer generation, broadly those born between 1946 and 1964. As well as a social network, the site features cashback shopping options, because old people are tight.

18. CafeMom
Yummy mummies
There's also a thriving subset of parenting networks such as CafeMom, GotKidsNetwork, and ParentsConnect.

19. Gather
Cash for questions
If you've got something to say, why not say it at Gather, which remunerates articles and features with reward points. That's how it works at Crave too, funnily enough -- anyone want to swap 3,000 Sharper Image points for some food? Please?

20. Greenvoice
None more green
Today, it's all about saving the planet. Greenvoice is an online networking platform for people who are conscious about the environment, who can sign up to support assorted campaigns. If that sounds like your cup of tea -- Fairtrade, of course -- don't forget to check out our sister site SmartPlanet. And get a haircut, you big hippy.