Lee Clow is resigning from his position as the chief creative officer for ad firm TBWA/Media Arts Lab, reports say. A veteran of the advertising industry for more than 40 years, Clow is best known for orchestrating Apple's most famous marketing campaigns, such as the 1984 Superbowl ad. The executive is also responsible for the dancing silhouettes in iPod ads, and the Get a Mac campaign attacking Windows PCs.