NEW YORK (AdAge.com) -- In the wake of her high-profile promotion of AMC's "Madmen" show on Twitter, Carrie Bugbee is building a Twitter-based ad agency for entertainment clients. In February, the first annual Knight Foundation-backed Shorty Awards honored Ms. Bugbee's "Madmen" character tweets as the year's best Twitter advertising campaign. In this nine-minute video interview, she discusses the details of how she did it as well as how she's working to parlay that success into an expansion of her 15-year-old PR business.