I've recently installed the Unity Integration 0.4.1 and I'm still using a DK1. The head tracking works but i can't get anything to display in the Rift, it just goes blue (Doesn't say that I can't detect anything, just blue, nice soft blue...)
Is there a black background with two blue eye bubbles, or is the whole window rectangle blue? It sounds like you need to double-check your OVRCameraController. Can you try restarting Unity, deleting the OVR folder and any Oculus bundles in your Plugins directory, re-importing the integration package, and dragging a fresh copy the OVRCameraController prefab into your scene?