Check out this shark shaped light gun for the Wii. The third party controller can be purchased for a little under $11, and can have you shooting up your enemies with a shark in no time.
The "Shark Gun" is designed to work alongside your Wii nunchuck in shooting games and claims to bring a "you are there" feel and " a sense of shark like invisible force." I can't imagine that any of us would really try to go out in word with a toy shark as a weapon, but none the les the controller is an interesting concept. Pick it up now from DealExtreme's website.
Do you like the idea of the shark gun, or would you rather see video game controller weapons look like actual weapons?