I played with the Yod'm 3D utility a few weeks back.  Wasn't too impressed; caused some strange behaviours, didn't install well, and was quite slow.

Switcher is really cool though.  Offering the same thing as Window's Flip3D, but now with Exposé-like layouts.  Hitting PgDown/PgUp switches between the "dock" layout and Exposé layout.

I recommend you give it a try.