Below is a link to the NYU Tisch Film Wiki (aka the Mother Lode for Cell Phone Cinema Students regarding all things production). Left column, fifth item down is a link to a storyboard template. You need to be logged in to home.nyu.edu to view our site. There is also a pretty definitive page on Wikipedia. I donate $5 a month to them so linking to them makes me feel like I am seeing a greater return on my investment!