Ok, so I've been pretty hard on Silverlight here lately. Yes, a lot of my 'softie buddies have given me grief, but the truth is the truth: Microsoft doesn't dogfood Silverlight technologies enough right now for me to be comfortable.
BUT...I came across a site today that really has some potential. It is http://www.tafiti.com/. It is a freaking rocking front end for searching using the Live.com engine.
Well done!