There's been a rather perverse tendency in the tech press to view the absence of Flash on iOS as some personal vendetta of Steve Jobs'. I don't think that's really credible, now, if it ever was; other companies are clearly willing to avoid it.
By the way, I called this in February 2010:
Microsoft says that it is working with Adobe on this. I strongly suspect that Microsoft, which has the advantage of entering late, is just playing for time; by the time the initial Windows Mobile 7 (or whatever we're meant to call it now) comes out, Flash will have been on Android for some time, and Microsoft will just be able to point and say "Given that everyone hates Flash on Google phones, we're not going to bother". This wouldn't be a great surprise; when Microsoft pre-announces a feature, that by no means demonstrates that the feature will actually ship, as we saw with Longhorn/VistaIt increasingly looks like Mobile Flash will be an Android-only thing, which can't be wonderful for Adobe.