Wiki's

Wiki's are places where people can put info for other people, Which anybody can edit or read them.Wiki's can contain alot of infomation and can be very helpful
A wiki that interests me is
http://en.wikipedia.org/wiki/bmx

Blogs can only be edited by certain people, And dont always contain factual info, Usually some ones opinion, where as wikis usually have infomation about different things

The video told me that a wiki is very usefull for organising things, for example trips, or camping ..., It ables them to co-ordanate there trip easily