I was waitlisted at my dream school, and the director of the program told me I was #9, and since the program was pretty small, I didn't think I had a chance of getting in. I flew from IL to TX for my spring break to visit, and I got an email a few days later saying my willingness to travel showed my dedication to the program, and I was accepted! It is definitely worthwhile to show your interest in a program if you are on the waitlist!