Hey Dan, How will the new UI work? Will it be Rick-Click like the current?
It's going to be quite different.
New in version 2 is the concept of selection (which is now different from the object the camera is pointed at).
And the right click screen is gone, everything can be done with the left mouse button.
If so is it possible to remove the UI temporarily?
Yes. At the moment I've got the Tab key hooked up to toggle the UI, although I plan to experiment with the UI sliding out of the way when not being used.