Is there an exercise game in the works for the Wii?

Alongside some odd rumors, this blog seems to have their bases covered.

Main Blog Page (Index): http://www.wiiwii.tv/category/fitness-freak/

Related Blog Articles:

http://www.wiiwii.tv/2007/09/19/tgs-07-konamis-show-line-up-looks-pretty-healthy/ (DDR)

http://www.wiiwii.tv/2007/09/06/its-tantra-baby-yoga-training-on-the-ds/ (Yoga)

http://wiinintendo.net/2007/01/15/wii-sports-experiment-results/

http://www.videogamefitness.net/wii-exercise-experiment-day-30-164-pounds-lost-and-final-results/

Above all the question is:
Is exercise via consoles like Nintendo's Wii and the Xbox's DDR the wave of the future to staying physically healthy? With XBox's Dance Dance Revolution Series going strong, Nintendo is sure to follow suit, if not improve, on the trend that is inviting the user to not only exercise but to have fun while doing it.