Microsoft executives said they thought the company would have an advantage because Silverlight has a more sophisticated security model. “Desktop integration is a mixed blessing. There is potentially a gaping security hole,” said Microsoft’s Mr. Becker. “We’ve learned at the school of hard knocks about security.”Don't forget that most of the spam you receive today is sent from hacked Windows PC's. I think that Microsoft still has a bit of learning to do.
Congrats to Adobe. The last time that I played with AIR, I thought it was a pretty cool tool. I'll have to take another look at it again.