The SageMC user interface is required for this plugin to work.
This first screen-shot is the basic user interface for iMovies. It works much like the coverflow interface although the animation is not yet as good.

This next screen-shot shows the alpha search bar at the bottom. This provides a way to quickly browse through a larger collection and jump-to a title that begins with a certain letter.

There is also a way to drill-down by genre, group etc.
Read more about iMovies at SageTV forums