This is just stupid.
With all the competition in the App Store, developers wouldn't go for the "lowest common denominator." Cross platform developing works fine, if the tools are good, and Adobe generally makes good tools.
And if Adobe didn't implement some "innovations," then the developers can always abandon Adobe's tools and use Apple's SDK.
No, the real reason for banning cross platform development is that Jobs wants to prevent developers from easily branching to Android.
Yes, I read Jobs' letter. Apparently so did you, just couldn't see through all the ********.
Why do you think Apple is suddenly the champion of "open standards," and why is such championing limited to the web?
Did it never cross your mind, that it may be because Jobs doesn't want to allow the most common plugin on the web in his walled garden, so that he can monetize content which may otherwise be available to iPad users elsewhere, often for free?
And if it was all about "open standards," why is Java banned as well?
Do you think it may have something to do with applets breaking the golden wall of the garden?
Or did it cross your mind, that the letter is timed to deflect criticism of the lack of Flash on the iPad, right before the Google I/O in May, where Android 2.1 and Flash 10.1 are announced, working happily together on mobile devices?
No, it didn't I suppose.