Thanks for bringing this to our attention. I think the Silverlight community will definitely benefit from having this new addition on board. I hope this site will grow each day and we'll see more interesting Silverlight applications on it.
Personally I like tafiti.com a lot and may be if someday slightshow.com gets ported entirely to Silverlight (I mean no HTML), it will be a great distinguishing point from the other community sites. And of course the site itself will be a great Silverlight showcase.
All the best,
the Telerik team