Experience shows that decisions in the early phases of the development of a multimodal system prevail throughout the life-cycle of a project. The distributed architecture and the requirement for robust multimodal interaction in our project SmartWeb resulted in an approach that uses and extends W3C standards like EMMA and RDFS. These standards for the interface structure and content allowed us to integrate available tools and techniques. However, the requirements in our system called for various extensions, e. g., to introduce result feedback tags for an extended version of EMMA. The interconnection framework depends on a commercial telephone voice dialog system platform for the dialog-centric components while the information access processes are linked using web service technology. Also in the area of this underlying infrastructure, enhancements and extensions were necessary. The first demonstration system is operable now and will be presented at the Football World Cup 2006 in German...