In his EWeek review, David Coursey gives a preview of what users can expect in Microsoft Office 12 (on page 2 of this review):

http://www.eweek.com/article2/0,1895,1888229,00.asp

The highlight is his comparison of OneNote and NoteBook:

I am not a big fan of OneNote, the information organizer built for the Tablet PC. While most of the applications in Office have been around for all 12 revisions, Office 12 is really only OneNote 2.

I am still not sure why OneNote needs to be a separate application from Word. And when I need to "gather everything in one place," which is one of OneNote's stated purposes, I use a Mac application called Circus Ponies NoteBook. It's a very good piece of software, which I can't really say for OneNote.

Comparative reviews don't get much better than that.

Elizabeth