Elevator Speeches about yourself

There is a short but interesting blog posting from Daisy Wademan Dowling titled How to Perfect an Elevator Pitch About Yourself. She provides 5 simple recommendations to perfect your speech:

1. Practice, Practice, Practice
2. Focus on impact
3. Focus on "I" instead of "we", empahisizing your own individual contribution
4. Be slow and steady
5. See the whole world as an elevator and give your speech to everyone

Does anyone know of elevator speeches that may be good examples?