As I understand it Kindle Fire doesn't run the Android Marktetplace. They are treating it like an entirely new platform. Which means that Kindle Fire is not more fragmenting Android anymore than WebOS fragmented Android.
I am on record here, stating more than once, that the iPhone 4S would be the first model of iPhone I haven't owned. I quickly changed by mind when I tried Siri in the Apple store. In my opinion Siri is as big a leap forward as multi-touch was. I use Siri throughout the day, every day. It very tangibly makes my interaction with the iPhone easier.
I'm half way through, first book I have ever read on my iPad. I have followed Steve Jobs for more than 30 years yet most of the information in the book is completely new to me. I will miss Steve forever.