Check out www.nba.com... over in the left hand column, just under the scores, there is a very nice Silverlight based photo gallery... double chick on the big "play" button and I guarantee you will be sucked into several minutes of awe watching the very crisp, full screen, fast passed, action packed photos stream by..  The page is also a great example of how easy it is to mix and match Silverlight and existing flash content on the same page...

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Here is just one example... 

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