1. A method embodied in a computer system for providing role-based renditions of a shared document during a Web conference, comprising: associating roles with participants of said Web conference; providing a rendition selection user interface at the beginning of said Web conference and during said Web conference to a participant of said Web conference having a presenter role and who controls said shared document during said Web conference, wherein said rendition selection user interface enables associations to be made between said roles and renditions of said shared document, wherein said shared document is shared with all participants of said Web conference during said Web conference; providing different renditions of said shared document to different participants of said Web conference based on said roles associated with said participants of said Web conference, and further based on said associations between said roles and said renditions of said shared document; and selectively sending metadata from said shared document to different ones of said participants of said Web conference during said Web conference responsive to said roles associated with each of said participants.