Knol: a unit of knowledge
Wikipedia receives loads of traffic from Google, and to be honest, there's no clear sign that this will change. But Google has gone so far as to launch a sort of would-be competitor, "KNOL".
Like Wikipedia, Knol encourages users create articles (also called knols). A key difference is that one user (or a small group of them) is actually given credit and pictured at the top of every piece. After that, other people are allowed to suggest changes, and the original authors can accept or reject them as they please.