"Today, we're announcing a licensing program for the 2007 Microsoft
Office system user interface which allows virtually anyone to obtain a
royalty-free license to use the new Office UI in a software product,
including the Ribbon, galleries, the Mini Toolbar, and the rest of the
user interface."
I've never heard of anyone licensing a UI system before (separate from
a software system).
Is there any precedent for this? Can Microsoft actually require
licensing of the UI? Is it enforceable?