Have you ever noticed the 'Note this' button on the Google search results? I don't know when the integration into search happened, but I just notice it.I did hear about Google Notebook long back but dismissed it off as an attempt at adapting another Windows app for the Web. Now that I have played with it and understood it a little better, I think its a nice little app.
Google Notebook (and the link in the search results) allows you to clip parts (text,images, links, whatever) of a webpage or search result and take notes while searching or browsing. You can then organize your research, add personal notes and share it with others.
There is a probable hidden agenda for Google here! Pages being noted are in all likely hood most meaningful and also related to each other for that query or note. I am sure the engineers at Google have a nice little hack tracking what pages are being noted together. At a later stage they can easily integrate it into their search results. Now this is making others organize the worlds information! :)
I don't know if Google Coop took off, but this seems to be a much better way of achieving the same objectives...
- show results that reflect your knowledge and interests and
- help improve Google web search for specific subjects by noting/labeling the best sites
- add custom search results to Google search for users who trust you