Introduced earlier this year, SunPhos, a sun path prediction/display app for Android allows photographers and videographers to graphically display the location and angle of the sun, and thus the direction of its light, for any given time and place. 

SunPhos will display the position of the sun and the path of its light on a map or satellite photo of a location (it appears to use the Google Maps interface for this) and gives Azimuth, Elevation, and Shadow Ratio, among other parameters.

SunPhos is compatible with Android 2.1 or higher and is available at the Android Market for US$1.99.