If you are searching for great information about multimedia interaction design, the Representation and Interaction Design Journal is a great resource. It was developed for students taking a course of the same name at NYU.
Posted topics include multimedia theories about information design, definitions, defining interactivity, information design and emotions, informaton design: language and semiotics, cognition/theoretical framework, media specific interaction design, and more.
Some of the "names" include Schneiderman & Plaisant, Betrancourt, Dan Saffer, and Shedroff.
If you are interested in these topics, I've listed a few books and on-line resources that might be helpful:
The Cambridge Handbook of Multimedia Learning (2005), Richard E. Mayer, Ed.
Designing for Interaction: Creating Smart Applications and Clever Devices (2006), Dan Saffer
Digital Multimedia Perception and Design (2006), Sherry Y. Chen & Gheorghita Ghinea
Teaching Every Student in the Digital Age (online)
Multimedia: From Wagner to Virtual Reality (online)
Book Randall Parker & Ken Jordan