Given that Adobe are working with MS to get Flash on WP7 - proper Flash, not cross-compiled Flash, your comment is... to be diplomatic, wishful thinking. If Adobe can generate working SL apps then MS wont be bothered how they did it.
As for the multi-tasking 'technical reason' - well, people need something to believe in I guess.
Now just because Microsoft worked with Adobe on getting Flash to work in the web browser doesn't meant that they will be as helpful when moving developers away from their tool chain and towards flash for their main app development.
I'm not saying that I believe the Apple party line, but I can see how Apple is at a disadvantage in program inspection to Android and Microsoft in that their dev language isn't vm based.
Really, if Adobe wants to remain relevant, I think they have only one option...go html5 and go all in.
