7. Apparatus for establishing a multimodal personality for a multimodal application, the apparatus comprising a computer processor and a computer memory operatively coupled to the computer processor, the computer memory having disposed within it computer program instructions capable of: selecting, for use by the multimodal application, matching vocal and visual demeanors by: retrieving a user profile from storage; selecting a vocal demeanor in dependence upon the retrieved user profile, the vocal demeanor being selected from a plurality of vocal demeanors and being characterized by a first attribute; and selecting a visual demeanor in dependence upon the retrieved user profile, the visual demeanor being selected from a plurality of visual demeanors and being characterized by a second attribute, wherein the visual demeanor is selectable separately from the vocal demeanor, and the vocal and visual demeanors are selected such that the first attribute of the vocal demeanor matches the second attribute of the visual demeanor; and incorporating, by the multimodal application, the matching vocal and visual demeanors as a multimodal personality into the multimodal application.
10. The apparatus of claim 7 wherein selecting a vocal demeanor comprises selecting a vocal demeanor in dependence upon visual properties of a history of a user's navigation among web sites.