I was browsing around and found this great article on integrating Dynamics CRM with Office OneNote (MSDN, Jeff Cardon, Rachel Drossman). It's 4 months old but not worth missing out on.
Extending Microsoft Dynamics CRM to Office OneNote 2007
And here's a set of open-source tools that achieve it: Microsoft Dynamics Snap for Microsoft Dynamics CRM
I'm a BIG fan of OneNote, I use the screen clipping tool every day (Windows Key + S). I also love developing integration addons so I think this is a great resource. I already have great ideas on what could be created to link the two applications and exchange data.
Radi A.