One of the blogs I read has a great article on the elevator pitch.
Dumb Little Man
Now that robots have shipped, it's time to pratice your elevator pitch for the judges. You need to grab the judges attention. Pratice that 30 second intro about the team and why your robot is the best at the regional. Select a talking point about your robot that will set you apart. The last thing you need to do is pratice, pratice and pratice.