It looks like wikis are springing up everywhere to export knowledge, facts and fiction. Wikis seem to have become facilitators in the explosion of what is to know out there. I have found that not only libraries make use of them, but so do cities, schools, museums. One can find recipe wikis, travel and famous person wikis, you name it.
I am personally envolved with familysearch wikis. If you are into genealogy and need to find some ideas of how to research your ancestors, this is the site to come to! http://wiki.familysearch.org/ has thousands of articles and research helps to get you started in genealogy or to help you break through some seemingly impossible problems. Suggestions and guidelines come from professional genealogists who know how to do research. Trust them, they know what they are talking about.