The Playstation Blog has started a mini series about how to play Patapon. They are calling it "Patapost Friday"
The second in the series was posted today with information about how equipment affects your tiny troops
They also give the tip that all boss battles can be done infinitely many times allowing you to receive more equipment.
The first Patapost Friday link is http://blog.us.playstation.com/2008/02/29/patapost-friday-pata-tips-1/