Consider that one more giant flashing red warning light over the Wii-Jenga enterprise. Of course, it could be that the physics aren't so nerfed as the blocks are hella heavy. Like steel girders. Maybe in the fantasy land of the Wii, the limits of our puny human muscles are no longer relevant, and Jegna Tower can rise high and strong, unfettered by our twitchy human nervous system. Truly Wii Jenga will be the 21st century Tower of Babel, a true testament to the majesty of mankind. Silly Nimrod, you can't reach heaven without a wiimote!
But all that said, I should make my standard disclaimer: I withhold judgement until I hold the shiny disc in my grubby little hands.