I don’t know why I can’t just comment on another answer in this thread, so I apologize for posting these comments in response.
I think MS really should do this, as this could be a cost-saving solution for WP7. Although I personally believe that my experience with WP7 and my Samsung Focus was as good or better as with the second-generation iPod Touch, which I have, there are many people who are not convinced. For better or worse, the ecosystem really matters, and MS has it in the corporate world.
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