cocoa xcode unity integration

Hi i am reading the blurt post from 2009 regarding integrating uiviews and such with unity.. is this post still valid?
http://technology.blurst.com/a-cocoa-based-frontend-for-unity-iphone-applications/

or is there other methods of doing this these days?

The app i am trying to do would be about 60% cocoa and 40% unity for certain sections
any suggestions really appriciated