iTunes 10 song link redirection

To redirect links next to songs to iTunes Library instead of iTunes store:
defaults write com.apple.iTunes invertStoreLinks -bool YES
to restore
defaults write com.apple.iTunes invertStoreLinks -bool No

To disable links completely:
defaults write com.apple.iTunes show-store-arrow-links -bool FALSE
re-enable:
defaults write com.apple.iTunes show-store-arrow-links -bool TRUE

via beszeljukmac