http://www.youtube.com/watch?v=srczFqh8-NQ This is a relatively short tutorial demonstrating how to use NGUI to create a single draw call UI, and shows how NGUI allows the UI to scale perfectly between different mobile device resolutions and aspect ratios. This will allow you to create one universal UI for iOS and Android development.
Hey, wow we just finished developing some NGUI layouts and we're going to explore how to to this exact same thing. Will give this a shot and let you know. Thanks a lot. Are you with the NGUI team?
Awesome glad the insight could help. No I'm not with NGUI, just a long time Unity and NGUI user. I've worked on a few commercial games that shipped using NGUI and I'm pretty happy with what it allows for, considering Unity's limited GUI capabilities.