Who would have thought that combining a blog format with the direct-connectedness of instant messaging would be so big? Obviously Jack Dorsey, Evan Williams, Biz Stone, and the 75 million users of Twitter. Microblogging services like Twitter that usually come with their own social network have begun to usurp traditional media-delivery services. You won't hear anyone ask, "Did you catch the news today?" Only, "Did you check Twitter today?"