i cant believe no one has recommended the op actually just buy a flash. Obviously the op is quite new to photography because generally a direct flash is too harsh but an off camera flash would give the results she wants. Her problem being camera shake not the camera. She could buy the d3 and still have this problem.
And in this area nikon flashes are alot cheaper for what you get than canon flashes.
And in this area nikon flashes are alot cheaper for what you get than canon flashes.