Leave it to third party manufacturers to devise a Wii sensor bar that's both wireless and cheap-looking. No doubt easy to manufacture—since you can replace your Wii sensor bar with candles—this solution will run you only $24.99 + shipping.
Great for people with projectors or oddly-designed entertainment centers, the wireless bar frees you from having to place the Wii within a certain distance of your TV set. The bad news is these run off a 9V battery, which means good luck to your family in case there's a fire.
Product Page [Wireless Sensor Bar - Thanks everyone who sent this in!]