Well, Google does have licensing requirements, which aren't completely public, and the payment arrangements aren't entirely public either. But I have seen repo

Well, Google does have licensing requirements, which aren't completely public, and the payment arrangements aren't entirely public either. But I have seen reports that the payments don't all go one way --- that, for instance, carriers get some share of Android Market purchases made on their networks. As to whether Amazon would want to meet Google's requirements, that's a business decision on their part. Barnes and Noble hasn't for the Nook, at least so far --- but that's in part based around a strategy of marketing the Nook entirely as a niche device (a Kindle work-alike with a better web browser). It may depend on how many of the most popular apps show up in the Amazon Appstore when they get close to launch.