In the span of just five short years Twitter has not only changed the way people communicate, but also how we do business. From aspiring entrepreneurs and major corporations to celebrities and everyday people, everyone seems to be tweeting and RTing. While some view the social media portal as just another technological distraction, others are using it to make contacts, forge relationships and gain access to information that otherwise would have been unattainable through normal channels. Still, with a reported 145 million registered users (including @BlackEnterprise and our staff of thought leaders) it can be a chore to sift through the Twitter chatter to find the right people to connect with. Well, BlackEnterprise.com has the 4/11 on 11 key people you should follow on Twitter if youâ€™re serious about business. RT that!