Remember the last time you heard somebody say a federal agency did a great job? Not recently, eh? I, too, confess to not saying it often, but I'm saying it today. Three years ago, I wrote about an innovative new shuttle system getting underway in Glacier National Park. In my first line, I asked, "If we built it, will they come?" The results are in, and the answer is yes. In 2009, in fact, 157,000 people used shuttle buses instead of driving personal vehicles over the traffic-choked Going-to-the-Sun Road, and according to Glacier's public…