It isn't, really. They've built their Kindle product on the Android codebase, but it isn't Android and they won't be allowed to even call it an Android tablet, because they're not dancing to Google's tune.
The new Kindle tablet may be sort-of compatible with Android today, but this isn't likely to remain the case since there is no feedback loop or collaboration between Google and Amazon in this.
The new Kindle tablet may be sort-of compatible with Android today, but this isn't likely to remain the case since there is no feedback loop or collaboration between Google and Amazon in this.