Mark, EXCELLENT insights you've added here, and I couldn't agree more!  Indeed, there is great leadership that comes from a great idea - one that is substantiated, provides solid vision and can get others rallied with passion.  I think you've really hit on something here, and it's a slightly different way of looking at it.  I LOVE it!!  And, by the way, I love to fill a vacuum!!!  There's nothing more exciting than closing gaps!!