If you use Google Notebook, you'll find a new link at the top of search results pages: "My notebooks". There are two possible situations:
* you have the extension/plug-in. In this case, it's the same as if you clicked on "Open Notebook".
* you don't have the extension/plug-in and Google emulates the interface. You can copy search results in the notebook by clicking "Note this" next to the snippet, manage your notebooks or type some text in a new note.