Twitter has done a great job of publicizing microblogging. But how does this translate in the corporate context? Lawyer Mary Abraham does a great job of summing up some of the advantages, but also cautions to not jump on the technology just because of the hype. You should really have a clear idea of how this tool can improve workflow.
For a further discussion on the use of other micro blogging platforms, including Yammer, read this detailed post on Microblogging as a Corporate Tool.