I am an avid user of Google Reader. A while ago, Google added the ability to share an item with a note. I assumed that this note used the same mechanism as Google Notebook, even though I wasn't a user of Google Notebook.
Today, I tried out Google Notebook from my phone, as I wanted to jot down some ideas that I had. I was expecting that the notes that I had written from Google Reader would be there. They didn't appear anywhere in Google Notebook. It looks like the notes from Google Reader and the notes in Google Notebook are completly seperate (which I think is pretty silly).