Confirmation of the new version of the Wii being sold at retail stores across the world has been on other forums for about 2 weeks. I still havn't seen it mentioned here sooo,,,, yeah now it is.
The new revision has three legs broken off the chip that controls the DVD drive. The three legs are not required for the Wii to function so from the average users point of view nothing has changed.
It is still possible to access the serial port on the drive but you have to use a dremel or acid to expose a small portion of what remains of the legs inside the chip.
In short Nintendo has prevented the casual home user from making changes themselves. Good news for those who offer installation services!