Bart Wessels has put some nice demos online about using OneNote and InfoPath forms in combination with SharePoint. For the people who don't know what OneNote is: Microsoft Office OneNote 2007 is an easy-to-use note-taking and information-management program where you can capture ideas and information in electronic form. Insert files or Web content in full-color, searchable format or as icons that you can click to access.
For more information about InfoPath check the following link: Introduction to Microsoft Office InfoPath 2007.
http://blogs.microsoft.nl/bartwe/archive/2007/07/16/12116.aspx
http://blogs.microsoft.nl/bartwe/archive/2007/07/16/12112.aspx
http://blogs.microsoft.nl/bartwe/archive/2007/07/16/12111.aspx