Another quick follow up. The first, our local Honda dealer, with relatively new, young technicians, heard the noise, but couldn't find anything to fix. However, before I traded the Odyssey in on a Sienna, I felt it was worthwhile to take to another dealer even though it was about 50 miles away. The technician was very experienced, quickly heard, and agreed that the wind buffeting was abnormal. He literally spend several hours with me, taking the door apart and taping everything on the door. We went on numerous test drives, consistently making changes. Ultimately, to both our surprise, the problem was the door handle. Neither of us could see anything unusual about the door handle, but the wind buffeting clearly went away when we taped the handle and returned when we untaped it. He took the handle apart and all seals seemed fine. Never the less, he ordered new handles, put the new handle on, and the wind buffeting on the passenger side is gone! The handle does have only one bolt holding it on, so I wondered if a slight change in the angle of the handle could be the difference, but neither of us could see any "abnormal" angle. I'll be keeping the Odyssey now, thanks to Alex, the technician.
Those of you with continued excessive wind buffeting may want to try taping the handles completely and see if it makes a difference. It that works, try taping the front of the handle and then the back part of the handle. With my Odyssey taping the back part of the handle was what made the difference. Alex did say that this was the first time the handle was the issue, and he's chased down excessive wind noise in multiple Odysseys.
I hope this helps some of you. Let me know if it does.
Rog Klettke