CNET, Gaming Today and other sites report that the Wii Light Sword is available for £14.99 (roughly €20 or $30) from Play.com. It ships on November 30th.
The Light Sword for Wii controller accessory features a power-up and power-down light effect. It has 22 ultra bright LED's built-in that are powered by 3 x AA batteries.
After you get your own light sword, you too will be as cool as this kid from the before-and-after videos below:
Note: Play.com is accessible from I4U via the credit link or alternative sources below.