The new Cloth simulation system of Blender brings a lot of possibilities for animation. Did you try it already? Well, a few artists are actually playing around with it, and they are creating amazing simulations!
Check out this Demo, from an artist called nudelZ:
Blender cloth simulation from Daniel Genrich on Vimeo.
Impressive, isn't it? If you want to try out the new system, go ahead and download the Blender 2.46 RC1, with the Cloth simulation. Is just me, or there are a few builds with a RC2 label for OSX?