Just came home from Ollie's with one of those Giant Pacman Joystick deals from Arcade 1up. They are $59.99 there while supplies last and they are going quick!
I will say it's a neat novelty, but you're not going to be playing long games on it. It's an awkward position to play for me and forget precise control. Pacman is easier with a 5200 controller for me than this!