I just upgraded from free to the full version today and I'm transitioning the last of my unity built in GUI over to NGUI.
I've implemented a chat box very similar to the one in the shipped example. My issue, however, seems to be that while I'm typing in the input, the key event propagation is not stopped and the key strokes still effect the game.
This was something that the built-in text boxes in Unity were providing for me and I'm definitely looking to get the functionality back. Is there some documentation, or example, etc.. that someone can point me to?