Has anyone attended a speech by Burt Rutan? He is speaking http://www.ideafestival.com/?607 in Louisville Kentucky (where I live ) this saturday and it's in conflict with some other plans. I was wondering if it's worth the $25 to attend and cancelling some plans for an excellent weekend of rock climbing. Opinions? There are some other presenters as well that may be interesting. Lynn Harper NASA Ames http://www.ideafestival.com/?601 , John Barrow http://www.ideafestival.com/?594. Thanks.