It took a while, but my personal porftolio in Silverlight called ScreenMachine, has appeared in The Silverlight showcase. You can also reach it through the ADdendum blog, too. When you select The Netherlands as Geography in the left menu of the Showcase you can find it as fourth on the first row (for now).
Edit Oct 2011: The new url for the Screenmachine is :
It is placed in the News Category and it is on the 16th page or
in th Silverlight 4 Category on page 61…