OS X Lion hides the ~/Library folder from view in an effort to prevent users from tampering with sensitive files or unwittingly tossing out their precious data. It’s easy to get to your user’s Library folder with a simple Go > Go to Folder command in Finder, then typing ~/Library. But moapp found a Terminal command that can bring your library folder back into focus:
Open the Terminal and type:
chflags nohidden /Users/[username]/Library/
Credit: http://mac.finerthingsin.com/post/7849528212/lion-library-folder-visible