This looks very interesting if you are looking for a way to automate some of your OneNote 2007 activities. Once again, Daniel Escapa links to an intriguing bit of programming, this time from Brian Dewey who is a Microsoft Office Product Manager. Brian has created the OneNote PowerShell Provider, which is a PowerShell extension that lets the user create and manipulate OneNote notebooks, sections, and pages.
As an example, he explains how he uses a script to notify those sharing a notebook that changes have been made. Brian is making this availabe via a Microsoft Community License.
Check out more on this here.