Thanks all. I did see a large lady hawking CLEAR brochures in DEN Thursday at the waiting passengers while the line snaked endlessly around but no takers. The "First Class" line looked shorter and had a dedicated security lane.
WN should really promote and list these stations on their web site as an added BS benefit. When you are already checked in and stuck in the human traffic jam, its a little too late to discover this option. I was tempted to leave and buy a BS fare and in retrospect, I should have done so.