My colleague Amir Khella is experimenting with the Avalon Grid control, using it to provide FishEye effects quite unlike anything you'd expect from a mere layout container:

http://www.elementsofpassion.com/archives/2005/07/playing_around

http://www.elementsofpassion.com/archives/2005/07/more_avalon_gri.html

I've seen this stuff in person, it is awesome.  Highly recommended.