The big turning point in the adoption of Silverlight, the rich content, in-browser plug-in from Microsoft, could be this summer with the Beijing Olympics.  As previously reported, MSN will stream some three thousand hours of video on Silverlight.  (As we understand, this deal is for video casting in the United States only.)

On Monday at the NAB show in Las Vegas, Microsoft announced a number of partners who will use Silverlight to stream video.  The company said that daily downloads of the new plug-in has reached 1.5 million.

On Tuesday afternoon at the Microsoft booth, I caught up with Microsoft’s Steve Sklepowich who gave an update on Silverlight and shared a demo of how cool the Summer Games will look on a computer screen.

— Andy Plesser