The mashup began by me wanting to write a feed reader type of application end-to-end with Silverlight. Basically I wanted to really see if Silverlight could handle a real RIA scenario.
I wanted to utilize a lot of features in Silverlight that I knew would be required for any type of business RIA. I also wanted to go wild with the UI and test out just how flexible XAML was.
Here is a screen shot of my DIGG mashup! (The rest of this post is at my Cynergy blog)