This post will show you how to change the speed of the launchpad animation is osx lion

# off
defaults write com.apple.dock springboard-show-duration -int 0
defaults write com.apple.dock springboard-hide-duration -int 0
killall Dock

#fast
defaults write com.apple.dock springboard-show-duration -float 0.1
defaults write com.apple.dock springboard-hide-duration -float 0.1
killall Dock

#slow
defaults write com.apple.dock springboard-show-duration -float 2
defaults write com.apple.dock springboard-hide-duration -float 2
killall Dock

you can change the numbers to whatever you want for some very slow effects :D

to get it back to normal just type

defaults delete com.apple.dock springboard-show-duration
defaults delete com.apple.dock springboard-hide-duration
killall Dock