One last gripe (are you listening Crank Bros?):
With the ATACs I can float and feel the "wall" (for lack of a better term) at the end of the float and positively know where the end of the float is. So I can line my foot up on that wall and ride on it when I want to switch it up a bit.
With eggbeaters, there is no such "wall" to let me know where the end of the float is. So, sometimes when riding I'd want more float, but would be reluctant to go for it for fear of disengaging.
Edit: With the ATACs I've used Sidi Dominator (currently), Nike Kato III strap, and Lake (can't remember the model)