I just checked and Zumba for Wii is not out until 4th February 2011! Aggh!
Thought it was out now along with the Kinect one - oh well, I'll have to wait. Gonna get The Michael Jackson Experience though - looks great
EDITED to add: Have you seen the write up for Zumba Wii, it sounds BRILLIANT, can't wait til Feb when its released now
Buy Zumba Fitness Nintendo Wii from Asda Entertainment