If you look at Amazon's own page for Kindle Fire, it does not list Android OS as a feature (with the exception of the Appstore but that predates Fire).
Fair enough. But they obviously used Android, so people (including me) expect the tablet to compete with other Android tablets. That's the reason why I don't have one, even if I would only use the Amazon features. (I do own a Kindle, though, because it doesn't promise anything other than "buy books from Amazon.com and read them on an e-ink screen", and that's exactly what I want.)
