Musika: Interactive Visualizer Game for iPod
Sony BMG released a unique iPod Game tonight called musika (iTunes link):
Your music, your game! musika is a groundbreaking music visualizer game for your iPod that taps into your song library to create original game play. Characters appear on screen with a wide variety of visual effects. If you see a character that's in the song title, hit the center button. Faster reactions will earn you more points and special icons can be hit for bonus effects.
The $4.99 game requires a 5th generation iPod. It is not compatible with iPhone.