The uncle has one... And he loves it. Completely addicted. He confirms that you can, indeed, read it just fine at the beach and in direct sunlight. He also spends most of his time downloading the first chapter of books for free and selecting which ones he wants to buy... He treats the goddamn thing like a Blackberry.
And, of course, from the sales tracking side of things, the Kindle is a second wind for all the SFWP books. I get maybe five Kindle sales a day between the four books.