S2000driver, I don't know if I totally agree with your assessment of the Honda Owner's Link website ... supposedly this website is updated based on the most current recalls, TSBs, and other corporate Honda directives. I looked up 02 Odyssey oil recommendations on the owner's link and 5w-30 is recommended for this year as well.
Overall I agree this is a confusing issue ... would be real nice if Honda would have issued some sort of guidance similar to what Ford did when they went to 5w-20 in many of their vehicles, present and past models. Perhaps Honda did and I'm not aware of it? Has anyone seen an official Honda policy on 5w-20 applications?
I've seen a nice countertop protector at my Honda dealership that discusses this topic, yet is further contradicts owner's manuals and oil fill caps.