Okay, while not to be a spoil(er) sport, I now am convinced that the Epilogue that I read online Tuesday night was the 'real deal'.
Both the Baltimore Sun and the Times have released reviews of the book:
http://www.baltimoresun.com/features/lifestyle/bal-to.potter19jul19,0,6775865.story
http://www.nytimes.com/2007/07/19/books/19potter.html
(Interestingly, the Times bought the book at a store in NYC yesterday.)
As a kid (hell, even now), I was a big fan of the C.S. Lewis's Chronicles of Narnia. If the Sun is right, and we see a Rowling-homage to Mr. Lewis in this final installment, I will be all the happier.