Alcoholics have one, and so do drug abusers. Now <A HREF="http://www.cnn.com/2007/TECH/internet/02/20/email.addiction.reut/index.html?eref=rss_tech">people addicted to email also have a 12-step program</A> designed to tackle their obsession. An executive coach in Pennsylvania has devised a plan to teach people how to manage the electronic tool, which some users say can be as much an intrusive waste of time as it is fast-paced and efficient. Developed for cases such as a golfer who checked his BlackBerry after every shot, and lost a potential client who wanted nothing to do with his obsession, Marsha Egan's plan taps into deepening concern that email misuse can cost businesses millions of dollars in lost productivity.