On topic - I am working on a pistol grip that attaches just behind the trigger on the wii remote, so it can be held and shot like a real gun. I don't like the zapper one at all.
I made one out of soft materials just as a proof of concept, and it worked pretty well. Now I need to decide on the real material. Next time I'm at my dad's I'm going to bug him to check out his pistol grips and see if I can't snag one that may work for what I want, without having to mess around too much.