I've got the boring arcade style right now. Its fun hut this new idea using the accelerometer sounds great! I say they should incorporate the accelerometer into all the games they can! Its what makes the iPhone platform so unique and amazing.
I play the NES Pacman, works well enough for me. If you really enjoy pacman, you may want to consider Ms.Pacman. I really like the addition of different mazes, it brings a little more dimension to the game since the AI is predictable, and controllable at times. Only one ghost at a time is really out to get you, while the others are drones that just react to the direction your going.