Nope, it has already been confirmed. No WiiHD confirmed by Reggie Fils-Aime
The idea that there won't be a successor to the Wii, whatever it's name, and that it won't have a hi-def resolution, is patently absurd. Whatever it's name, there will be a WiiHD.
However, in an effort to avoid people waiting for the next piece of hardware rather than buying the current piece, all companies practice a form of coy denial ("that's rumor and speculation" doesn't mean there's no device, it just means there's no announcment) prior to officially announcing a device, and if I'm not mistaken, both the DS Lite and the
DSi recieved the same treatment.
What Reggie won't discuss is when the next Wii will go public, calling rumors of a 2011 release "pure rumor and speculation."