I just got an email via my blog announcing a new add-on to OneNote called: Xiipy Desktop Edition for Microsoft OneNote 2007. This is all I know about it from the website:
1.Automatic Content Analysis
Xiipy automatically reads through the text of your OneNote page and determines the most relevant terms to help guide its resource search.
Xiipy starts searching the web for pages and images related to your OneNote page without you having to open up a single search engine or type in a single key word. Let Xiipy be your research assistant today!
Xiipy integrates smoothly with OneNote 2007. The Xiipy controls and toolbars sit on the right and lower sides of OneNote and can easily be minimized to allow maximum viewing area of the notes page.
4.Quick Resource Preview
Thumbnail images of image resources found and search engine descriptions of website resources found can be easily viewed by expanding any item in the right pane to allow you to preview the data before deciding whether to use it in your notes.
Xiipy displays all the key terms it found in what is called a "Tag Cloud". This shows the relative importance/weight of each term based on how many times it shows up in the document.
Sadly they only have that one small image and I couldn't get it working on my machine. I am hoping that someone puts up a YouTube video showing how it works and giving a quick demo. In the meantime please leave comments below if you find this useful.