The tag cocos2d-iphone isn't specific to development on the iPhone. It is specific to iOS development, using Cocos2d and it even states that in the tag wiki.
Therefore, I recommend renaming this tag to cocos2d-ios. This suggestion is also supported by the fact that if you check out the cocos2d-iphone wiki, you will see that the other Cocos2d tags relate to other frameworks or architectures are not to specific devices that that Cocos2d can run on.
Furthermore, since all questions regarding cocos2d-iphone also directly related to the iPod Touch and iPad, I think this tag should be renamed with a more generalized meaning.