Googles Competitive Wiki

Seems Google aims to create content from those with knowledge on particular subjects allowing a greater sharing of knowledge, this new free tool is to be called "knol".
(Knol meaning a single unit of knowledge.)

Along with each knol will be some tools allowing for greater community interaction these include the submission of comments, questions and revisions as well as allowing a knol to rated. The ownership of a knol will remain with the author to manage and amend as required, there will be no google involvement.

So rather than using a wikipedia collaboration model for knols, authors of knols on the same subject will be in direct competition with each other to produce the best knol.

There are also some other interesting items that are listed in the googleblog, such as the authors that opt-in for adverts on their knol will receive a share of the revenue generated by those ads, providing their knol is popular.

Access to this new tool is invitation only at the moment in the first phase of testing and plus the application is still in development.

Source:
http://googleblog.blogspot.com/2007/12/encouraging-people-to-contribute.html