New England-based indie agency Allen & Gerritsen tapped former Draftfcb executive Graham Nelson to head its Digital Incubator, a newly formed area of expertise for the advertising agency. ... TWC signed director/DP Eric Saarinen, co-founder of recently closed production shop Plum, for exclusive commercial representation in the U.S. ... Globally-based production house Mr. Boomboom adds director Laurent Briet to its roster for worldwide representation. ... Director Adria Petty joined Harvest Films for representation in both commercials and music videos. ... New York-based interactive agency Renegade promoted Jeff Vinick from creative director to ECD while welcoming freelancer Asia Giles as creative director. ... Sweet Spot Productions was launched in Hollywood as a new, full-service marketing agency specializing in conceiving, developing and producing consumer and trade campaigns promoting feature films and videogames. ... Sparks Productions in Toronto hired Pamela Hamilton as the company's director's agent, where she will be directly responsible for the career development of all of the company's directors. ... New York indie agency Woods Witt Dealy & Sons appointed Daniel Gearity as an art director. ... New York full-service digital agency Zeta Interactive made nearly a dozen new appointments, including Craig Maccubbin as chief technology officer and Carlos Alcala as chief creative officer.