1. B. Lundberg, for the DONUT Collaboration, talk at this meeting. See also http://vmsstreamer1.fnal.gov/Lectures/ colloquium/lundberg/index.htm, http://www.fnal.gov/directorate/public _affairs/press_releases/donut.html.
2. For more conventional physics with a neutrino beam, see K. McFarland, for the NUTeV Collaboration, talk at this meeting.
3. E. Witten, talk at this meeting and hep-ph/0006332.
4. R. Mohapatra, talk at this meeting and hep-ph/0008232.
5. K. Dienes, talk at this meeting; K. Dienes and I. Sarcevic, hep-ph/0008144.