The Amazon Kindle Fire has peaked developer interests in the Android market, especially in North America. The Kindle Fire may already be the best selling Android tablet available after only fulfilling pre-orders.
iOS still leads the way, due to the best App Store on the planet!
The price of the Kindle Fire is the most compelling part of Amazon's new tablet, probably due to the limited success of the HP TouchPad after price cuts. I suspect that Amazon may be losing a little money on the Kindle Fire, but don't have the numbers to back it up.