06/21/2010 03:37 pm ET Updated May 25, 2011

To Tweet Or Not To Tweet? How Top CEOs Use Twitter (PHOTOS)

Should CEOs use Twitter? The ball's still in the court: for some it brings trouble, like when former Whole Foods CEO John Mackey discussed company stock info, while others believe it builds a valuable relationship with consumers and employees. Some CEOs tweet effectively, with millions of people awaiting their daily musings, while others use the social media tool as as little more than a company mouthpiece.

Whatever the cause, an authentically-written Twitter page from the CEO -- especially one that is not all shop talk -- can generate the most precious of commodities for marketers: actual interest and engagement with customers. Or, as with one ubiquitous and often maligned media maven below, Twitter can even make a corporate titan seem more human.

Check out some of the best CEO Twitter pages now.