MC Hammer, Twitter on Good Morning America

The ABC cameras were rolling last week when hip-hopper MC Hammer visited Harvard Business School to talk up the networking and marketing power of Twitter.

This clip on Good Morning America shows reporter John Berman, aka abcdude, attempting to answer the question, why would anyone "microblog" their life throughout the day in 140-character chunks?

Says Hammer, who has more than 90,000 Twitter followers: "I love anything that shortens the distance between creation and the consumer. The middle men keep getting in the way."

Harvard Business School professor Andy McAfee, an expert on business technology and Twitter user, offers his own perspective.

"Twitter has uncovered the need that most of us didn't even know we had. To talk about ourselves and broadcast our lives and our work in a very low cost, low overhead but very public way."

Have you used the marketing power of Twitter for business use? What were the results?