Satoru Iwata has confirmed with the Foreign Correspondents Club in Tokyo that Nintendo will investigate reports that the Wiimote strap is malfunctioning. Nintendo contends that the strap has been manufactured securely, but admits that "people are getting a lot more excited than we'd expected."
Iwata stressed the need for "additional methods to encourage people to kind of calm down," as if in-game warnings and a mass email aren't enough. If these incidents keep up, Nintendo's gonna institute a Wii license exam. Oy!
For your reference:
"Wii Have A Problem," an accident archive