1. A system comprising: at least one processor and at least one computer readable memory, said computer readable memory having stored thereon program code for indicating to at least one user that another participant in a real-time communication session would like to make a comment in said real-time communication session, said program code including program code for determining whether a user interface window in a graphical user interface in a client system associated with said user can currently be reliably used to indicate to said user that said other participant in said real-time communication session would like to make a comment in said real-time communication session, wherein said program code for determining whether said user interface window can currently be reliably used to indicate to said user that said other participant in said real-time communication session would like to make a comment is responsive to a current value of at least one communication state variable, and wherein said current value of said at least one communication state variable indicates whether said window is obscured by another user interface window within said graphical user interface, and program code for, responsive to a determination that said window cannot currently be reliably used to indicate to said user that said other participant in said real-time communication session would like to make a comment in said real-time communication session, audibly indicating to said user that said other participant in said real-time communication session would like to make a comment in said real-time communication session by generating an audio notification through an audio subsystem in said client system associated with said user, wherein said audio notification includes identification of said other participant in said real-time communication session who would like to make a comment.