shooting in snow is fine... just don't bury the camera in the snow if you can help it, and remember that if you go from a cold outdoor environment indoors to a warm and humid one you should be keep the camera in a case or covered in some way until it warms up. Otherwise you'll have a lot of condensation forming on it. Also, remember that your battery may not last as long in very cold temperatures before it needs recharging. That should about do it for precautions shooting in the snow.
dan
