Wishes on Trevi Fountain

At Trevi Fountain, you throw in a coin for good luck. Legend has it that you should throw two coins over your shoulder into the fountain; one coin grants your wish and the other ensures your eventual return to Rome. I only threw one coin - so I guess I'm not coming back, but I wished for all of you - so if good things start to happen, you'll know why. They say they recover $4500 per day from the fountain! That's good luck to somebody.