"h2g2 is an unconventional guide to life, the universe and everything, an encyclopaedic project where entries are written by people from all over the world.
The Guide is written by visitors to the website - www.bbc.co.uk/h2g2/ - and already it has thousands of entries on all sorts of subjects. It's a living, breathing guide that's constantly being updated and revised.
h2g2's inspiration came from Douglas Adams, author of The Hitchhiker's Guide to the Galaxy . Back in 1971, Douglas imagined a time when we'd have hand-held electronic devices that could access information about almost any place, object, time or event. This vision is now a reality in the form of h2g2 Mobile."
Personal Note: It is a pretty interesting site, kind of like Wikipedia. There is also a mobile version of the site for portable computing devices (require web access).