Creating a synth is easy, fun, and different from how you may have been using your digital camera in the past. We have a video that explains the process:
Photosynth is a radically new way to use your photography. To help you get the best results we've prepared the Photosynth Photography Guide which we encourage you to read and print out to keep in your camera bag.
The Photosynth Photography Guide (1.2Mbyte pdf)
The Photosynth Photography Guide (1.3Mbyte xps)