Guido Grassel works as a Research Team Leader for Web Technology and Usability at Nokia Research Center’s Internet Core Competence Center in Helsinki (Finland). He is a member of the W3C Web Application Formats working group, and a former co-chair of the W3C Synchronized Multimedia working group. Guido headed the research teams that initiated the Nokia Open Source Web browser and the 3GPP SMIL player for S60. His current research aims to make Internet truly usable and useful for the masses on their mobile device.