I personally haven't heard of anyone that I know busting their TV in a Wii-related accident. But I do know that especially when it first came out, there were quite a few cases of Wiimotes loosing themselves from the grips of gamers and causing catastrophic damage to TVs everywhere. If you're having issues even after getting a better strap, you might want to check this out.
The Wii shield is basically a piece of plastic that fits over your TV and protects it from flying Wiimotes. That's really all it is designed to do.
The Taiwanese manufacturer is not currently mass-producing these, but is planning to do so in the near future.
Wii quit: Taiwanese company making LCD shield [via joystiq]