Moving Apple Mail settings from computer to computer on OS X 10.8 Mountain Lion

The location has changed since Mountain Lion is out, now the Apple Mail settings reside in:

~/Library/Containers/com.apple.mail/Data/Library/Preferences/com.apple.Mail.plist

The Mail messages, rules and Notes are still in the old location:

~/Library/Mail

Just copy the contents to your new computer, and you are done!