Apple's certainly seen plenty of shakeups in its ranks over the years and, while this one may not exactly come as a shock, it's still tough to overstate the influence of Lee Clow, who has announced that he's stepping down as chief creative officer of Apple's main ad agency, TBWA/Media Arts Lab. While he also made his mark with a range of other clients (including the Energizer Bunny and the Taco Bell Chihuahua), Clow was most closely identified with Apple, and founded the Media Arts Lab as part of TBWA in 2006 specifically to serve the company. Clow has been the man behind virtually every major Apple advertising campaign even before that, however, including the famous 1984 Superbowl ad, the "Think Different" series, the dancing iPod silhouettes and, of course, the Mac vs. PC ads. Not surprisingly, another Apple ad man, Duncan Milner, has been tapped to take his place, and Clow will be staying on as Chairman if he ever needs a little advice. Let's head on past the break for a brief trip down memory lane, shall we?