Office For Lawyers
Yes, it says it's for lawyers but there's some good OneNote information even for non-attorneys there.
- Microsoft OneNote
The Official Microsoft site. Has information, instructional videos, blogs and other great content.
- OneNote PowerToys
Until recently seemed to be abandoned. Pleased to see the operators are starting to update it again.
- Office 2007 Service Pack 2: If you don't have Office 2007 SP2 installed you really should. Click the link to get it for free.
- OneNote Support Forum at Microsoft Answers
- OneNote Testing - John Guin's blog
- Daniel Escapa's OneNote Blog