Ring them up a day or two after and politely ask the status of your application ("I was just wondering if my application was complete and if there is anything else I can provide you" is how I used to do it). If they say they hired someone else, ask them why. It's sometimes hard to listen to but the tips can be very valuable.
"you're a doctor.... and 27 years.... so...doctor + 27 years = HATORI SOHMA" - RoyalWing, when I was 27
"Al hail the forum editting Shooby! His vibes are law!" - Osaka-chan
I could still be champ, but I'd feel bad taking it away from one of the younger guys. - George Foreman