I use live view quite often and obviously when shooting movie clips
I was reading that live view af (contrast) can be more accurate than phase detection (although not as fast – Sony has the best live view) and very suited to still subjects or for obtaining different view points.
The D7000 also has 3D autofocus in this mode i.e. I focus on the subject and is held in focus regardless of where I move
So yes live view can be a helpful tool