Dockers wants you to shake it.

Your iPhone, that is.

This may be the first iPhone-based ad that people will actually want to use. Using the iPhone's accelerometer the ad makes Dufon Smith, an urban street dancer, react and dance to the user-created movement.

The ad "will appear in the iPhone games 'iBasketball,' 'iGolf' and 'iBowl' and the lifestyle application iTV." Between different levels of the game, the ad will pop up prompting the user to make Dufon dance before moving on to the next board.

The ad is an obviously effort by Dockers to remain relevant to the middle-age, tech-savvy, male customer is covets.

(I kind of hate the use of numbers in "Shake 2 activ8" and "Shake 4 encore". Seems a little forced and tacky to me. More tween than successful business man.)

EDIT:
Dockers is really stepping it up by also co-sponsoring the Pandora application for BlackBerry. Dockers branding will accompany the start-up of the application as well as song information.