Exclusive The emails have poured in all day. "Thanks for the memories, Scott. It was fun." Sun Microsystems Chairman Scott McNealy says that most well-wishers seem to be treating his relinquishment of the CEO post as some kind of sad departure from the company he helped start. This reaction surprises McNealy to a degree - given that he'll spend the next few months traveling around the globe doing what he's done for the last quarter century - talk about Sun. You can, however, understand how outside observers sense a more dramatic shift taking place. McNealy has thinned out the ever-shrinking...