World Univeristy and School - http://worlduniversity.wikia.com/ - as open teaching & learning wiki will benefit potentially all 6.7 billion of us. Teach, Learn, Create Here
... and Now, in your language.
(Wikipedia, by way of comparison is in around 272 languages). :)
... and 9 billion to come ....
(http://scott-macleod.blogspot.com/2010/10/humanity-wuas-as-open-teaching-learning.html - October 11, 2010)