Twitter is rising in popularity seemingly every day. People are tweeting 50 million times a day—that’s 600 Tweets per second. And it’s not just teenagers tweeting about Justin Bieber. Plugging into a real-time idea stream—and joining the conversation—can help companies in numerous ways. In this edition of eWEEK’s Deeper Thinking, we discuss how and why Twitter has become a powerful business tool, from its use in market research to corporate image to customer service, and beyond.