A method of conferencing involves forming a main conference between a plurality of users, providing a user with an option to request a subconference with a subset of other users, forming a subconference between said user and the subset of other users, and at least partially removing those users in the subconference from the main conference during the subsistence of the subconference. The conference is preferably a multimedia conference and the subconference can be conducted in an arbitrary mix of one or more of the media used in the main conference. Subconference participants have the option of monitoring proceedings in the main conference by receiving some of the main conference media signals while the subconference is in progress. The invention also provides conference servers, terminals and software for use in the subconferencing method.