Games that use an anime license usually turn out quite shit but this could be a goodie - a Haruhi dancing game for the Wii.
Sounds like you hold the Wiimote and dance around. If only they made some sort of DDR sheet to go with it.
How many Wii users among us? Just a separate reminder that my PS3 ID is dannychoodotcom - feel free to add me.
Via Sankaku Complex.