THIS post raises two important issues. The first is Microsoft's "bribery as a business model", which it has already engaged in elsewhere, e.g. in search (and it failed). The second issue is Microsoft wanting to associate its GNU/Linux- and FOSS-hostile Web plague with something that is all about love and openness.
Adobe can't go around paying companies/organizations to use Flash while Microsoft can and is doing that. So spreading Flash as far as possible is the only option they have left because we know, nearly everyone has a price and Microsoft has the money and desire to spread Silverlight far and wide.
I was highly amused by the irony of Microsoft, demonstrating new Silverlight 3.0 features, and using Big Buck Bunny as the demonstration footage. Could they not afford to license footage from elsewhere for their big screens? A small dose of irony in my day.