App Localization in iOS4

I recall hearing that with the introduction of iOS 4.0, you no longer need to use the NSLocalizedString macro in order to lo开发者_开发技巧calize strings within an application into different languages. However, I have been unable to find any information or documentation about the new method that can be used for localization. Am I dreaming, or have I missed something obvious? If there is a new method for localization, I would much appreciate it if someone could point me in the direction of some resources on the topic. Thanks in advance!

Looking through the documentation, I can't find any mention of a new method of localization.