Stephen Hart, a corporate trainer specializing in recruitment and management training, read about Twitter in a computer magazine. He questioned the value of the "microblogging" tool and its 140-character messages. Yet he was curious and signed on. After a month of dipping in and out, he still believed the site to be pointless and void of business benefit. To prove to himself that Twitter wasn't worth his time, he ran an experiment, posting a personal development idea or quote each day from his @edenchanges account. He didn't imagine anyone would care.