I've been thinking about this too. I feel awesome that Amazon reached out to me but does that mean it's better than Droid/Berry/Nokia? If I agree to any new opportunity, what if it's the next Microsoft KIN/ZUNE (I doubt it)? Even if Amazon sells a million kindles a month (12 million a year), it would take them a few years to catch up to droid/berry/nokia? It seems like a high risk/high reward situation when I don't even know if the Kindle app store will work out at all. Whereas, the other markets are proven. I'm not disagreeing with you, I'm just talking about a different angle of approach.
OTOH, wouldn't you be more discoverable in a sparsely-populated Kindle App Store than a Droid or Berry Store filled with competition? I've got to stop replying to this. It makes me seem like I'm pimping Amazon. I feel unclean.