Company: Pitney Bowes, Stamford, Conn. Agency: Ogilvy & Mather, New York Market: Mailroom managers, CEOs Quick chase: "Mailstream." It's a new word to us. But Pitney Bowes has the credibility to introduce a new term into the corporate lexicon. To drive readers to its special mail-stream Web site, Pitney Bowes delivers a mini white paper on the growing complexities of a corporate mailstream and how Pitney Bowes can make a company's mail "more effective, efficient and personal than you may have thought possible." Clue: The vertical barcode does a good job of illuminating the selling proposition.