I have an app for my iPhone and iPad that saves my bacon time after time.
I present to you, the essential and indispensable Sun Seeker: 3D Augmented Reality Viewer By ozPDA
You see, I often find it difficult to know exactly where the sun is going to be when shooting time-lapse. When will it rise and even more importantly… WHERE!?!
See my full review over at 3Exposure.com – http://3exposure.com/2011/09/19/how-my-iphone-saves-my-time-lapse-shoots/