Blitz Games appointed John Jarvis as head of its new Blitz Arcade advergaming division. Jarvis recently served as the project manager for the highly successful Burger King/Xbox advergame effort. ... Media:edge CIA welcomed Nathalie Alfred as its director, corporate communications global, while its Hispanic agency offshoot MEC Bravo added Diane Librizzi as partner, account director and Edwin Camacho as account director. ... Agency.com named Jordan Warren as president of its San Francisco office. ... Mammoth Advertising hired Christian Cacciappoli as interactive media planner, along with Charles Lam as director of production and Michael Denton as manager, grassroots & viral marketing.