Looks like we're going with a cinematic ratio to add to the mood of the film. This will be 2.39:1 which is a standard ratio for many films you go to the movies to see. The other standard is 1.85:1 which is just a bit wider than HD16:9 but maybe not wide enough for what we're doing. Below are some diagrams to show you the aspect ratio...


If you would like to find out more about aspect ratios, the wikipedia page on it is pretty good: http://en.wikipedia.org/wiki/Aspect_ratio_(image)
As for storyboards, Ricky has done an amazing job drawing over 150 boards...big thx to him. If you'd like to make your own templates and give his hand a rest, go in to Photoshop and select the marquee tool. In the tool options along the top, change the style to "Fixed Aspect Ratio" and type 2.39 in the width attribute and 1 in the height attribute. Now when you click and drag the marquee tool you will have a perfectly proportional box that you can make any size you wish.
Nick
