Anyone who works with me knows that I'm a big OneNote fanatic! Not only is it a great piece of software, it is a great development platform for ISVs. One of the great things developers can do is tap into the OneNote API and extend functionality.
David Tse is a program manager on the OneNote team, and in his free time, he has created nice web export utility that allows web browsers to have a rich interactive experience with OneNote content. The project is currently being hosted on Codeplex, Microsoft's open-source content repository and source-code revisioning site.
Now the web exporter is is still pre-1.0 but that shouldn't stop you from trying it out and because it's open source, you can actually help to make it better!
Check out the OneNote Web Exporter here!