Wikipedia has been added to Google Co-op, although in a somewhat limited way. If you subscribe to the Wikipedia module, you will get links to relevant articles from the open-source encyclopedia on certain types of searches - like world leaders. (Note the top-most link in the screen capture below.)
It's not clear from the documentation which searches trigger results. Some of the triggers listed - like sports figures - are not working on my end. Google Co-op is a program that allows you to prioritize select third-party results in your Google searches.
Technorati Tags: Google Co-op, Google, Wikipedia
