There is a quiet revolution going on. If you thought Wikipedia was awesome then take a look at Wikibooks - open-source digital textbooks on any topic, in any language, available to anyone, anywhere, for free!
In the longer term, along with open access journals, this is really going to shake up the academic publishing world. Read the article to start to understand the true impact of this idea.
And take a look at the Wikiversity Project - read the vision statement - the potential is enormous.
The Gurteen Knowledge Community is a global learning community
of over 17,000 people in 160 countries across the world.
The community is for people who are committed to making a difference:
people who wish to share and learn from each other and who strive to see
the world differently, think differently and act differently.
Membership of the Gurteen Knowledge Community is free.