This will show you how to disable the fade animation in osx lion
open terminal and type in the following commands
defaults write com.apple.dock springboard-show-duration -int 0 defaults write com.apple.dock springboard-hide-duration -int 0 killall Dock
the dock will restart and the launchpad animation will be gone!
to get the animation back, type the following
defaults delete com.apple.dock springboard-show-duration defaults delete com.apple.dock springboard-hide-duration killall Dock