35. The at least one computer readable recordable medium of claim 29 , wherein providing to a multiplicity of users a presentation comprises: providing a session document for the presentation, wherein the session document includes a session grammar and a session structured document; selecting from the session structured document a classified structural element in dependence upon user classifications of a user participant in the presentation; and presenting the selected structural element to the user participant.
35. The at least one computer readable recordable medium of claim 29 , wherein providing to a multiplicity of users a presentation comprises: providing a session document for the presentation, wherein the session document includes a session grammar and a session structured document; selecting from the session structured document a classified structural element in dependence upon user classifications of a user participant in the presentation; and presenting the selected structural element to the user participant. 42. The at least one computer readable recordable medium of claim 35 , wherein: the first user participates in the presentation from a first computer; the at least one other user participates in the presentation from a second computer different from the first computer; and streaming streamed speech to a first user comprises transmitting in real time speech captured at the second computer via at least one network to the first computer.