Since you own Office XP, you qualify for an upgrade to Office 2003 (which is
lower cost). If you are a student or teacher, or have a student or teacher in
your household, consider purchasing the Office 2003 Student and Teacher
addition at an even lower price.
OneNote is not included in any of the versions of Office 2003. It is a
standalone application, simliar to Visio, Project, etc. As noted, there are a
few features in OneNote 2003 (such as emailing directly from OneNote) that
work only with Office 2003.
Lori Birtley
Microsoft Corporation
OneNote Product Planner