If you have not seen the photo posted by David Bergman of the inauguration then take the time and check out this 1400 meg photo. The site is set -up so you can zoom in and out on the photo. Check out the photographers in the middle of the shot on the tower. The site enables the viewer to zoom in anywhere on the scene.
If you never viewed a gigapan site then you are in for a tremendous experience. The images and the experience take photography to a new level. These images are not your 'normal' images from a point and shoot.
As always, get out and capture the beauty of life!