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