Another new feature in OneNote 2007 that I wanted to point out is the ability to save an image directly from OneNote. No more needing to copy the image and paste it into MS Paint/image app and then save the file. No, now you can save directly from OneNote, check it out:
Just right-click on the image and choose to Save As, just as easy as that. I use this all of the time.
Also you all should know about Win-S which is a way to create a screen clipping, just hit Win-S, select what you want and then save from OneNote, saves me so much time on a daily basis. Try it out and let me know what you think!