I believe that I reported on the Wii Zapper before, but I've heard a lot of complaints that users find it clumsy, especially in the trigger area.

I got a chance to try out the Nyko Perfect Shot at CES 2008 this year, and I loved it. As you can see, it is like a traditional handheld six-shot, and even has a cool grip. The Wiimote goes right on top, and the trigger feels easy and shoots very well.

I'm not a shooter-game player, but the Perfect Shot is really something for me. You can get it on the Nyko website for just $14.99.