Song Summoner, the great iPod game I've been waiting for?

The official description:

# Transform your iPod songs into "Tune Troopers" to combat the evil Mechanical Militia
# Tune Trooper types and abilities are determined by the songs used to create them
# Your Tune Troopers can be powered up even outside of the game--just by listening to the songs you used to create them!
# Control Ziggy, a "Conductor" that creates warriors out of music, and guide him through his journey to save his brother Zero from the Mechanical Militia
# Experience a turn-based tactics battle system, divided into player and enemy phases where each side takes turns maneuvering their forces
# Deploy the right troopers at the right time, and use contraptions found on the map effectively to achieve victory in battle!
# iPod Click Wheelallows players to play the game as easily as selecting music

Available at the iTunes Store. (66 reviews give it an average 4 out of 5 stars.)