New York post-production house Fluid launched an interactive division through a partnership with Boom Design Group, a Brooklyn-based interactive media studio. The partnership will now result in a suite of client services including editorial, music composition, sound design, web design/animation, content management, information architecture and e-commerce. ... Interactive agency Critical Mass hired former Digitas creative exec David Armano as vice president, experience design. ... MGH named Bronson Wagner its new interactive art director and Kirsten Ellison interactive account manager. ... Arizona-based Terralever welcomed Chris Hill and Chris Jones as director of interactive development and creative strategist, respectively. ... Ex-Tribal Fusion entertainment director Marc Hernandez joined online video service Revver as vice president, advertising sales.