Terence Tsang has published a Flash vs Silverlight comparison on the XML Image Gallery.
It is a new image Gallery! The Gallery is an xml driven slideshow which supports multiple galleries, thumbnails and lot more. You are able to add more images by just modifying the XML only. You are also able to see how I use XAMLReader (in Silverlight) in loading the XML easily. Images used in the application is a Top Model from Hong Kong.