The Williams Tower in Houston is (I think) a 'supertall' that really sticks out, but it's pretty awesome nonetheless. It's supposedly the tallest building outside of a CBD in the US? (not counting NYC or Chicago probably)
http://i.factmonster.com/images/transco.jpg
Love that rotating beacon at night!
http://upload.wikimedia.org/wikipedi...iams_Tower.jpg
http://0.tqn.com/d/architecture/1/0/...owerFlickr.jpg