I found this over at iphoneography. A nice way to visualize which direction sunlight, or moonlight, will be shining at any given time and at any location...
LightTrac is a must have tool for all outdoor photographers. You can use it to find when and where the light is perfect to shoot your subjects outdoors at any location. Whether you are a landscape photographer, a wedding photographer, a sports photographer or a nature photographer, you will love it. Find ahead of time, Sun & Moon's elevation/angle at any time of day, for any date on any place on earth. Then position yourself at the right spot.
via itunes.apple.com
