Herb - not sure why AOPA and some of the other 'orgs' are so misinformed, and spreading that misinformation as gospel. Cuba is very accessible, but just not wide open jump in your plane and go with no research. The easiest way to do it? Contact Jim Parker at Caribbean Flying Adventures-
jim@caribbeanflyingadventures.com
we have flown on his flyins, very cost-effective, to Dominican Republic, Puerto Rico, Caymans, Belize, Guatemala, etc....and of course Cuba. He even offers a 'fly it yourself' option for going to Cuba. Basically, ask him for info and he will help even if you don't join his flyins.