1. A system for establishing a conversation group among a number of hearing aids used by different users, said system comprising: a number of hearing aids each providing compensation for a hearing impairment of its respective user, and each adapted for wireless bidirectional communication, means for detecting hearing aids available for participation in the conversation group, means for selecting at least one but less than all of the available hearing aids for participation in said conversation group, and a shared wireless communication unit adapted for transmitting to and from the hearing aids selected for inclusion in said conversation group thereby establishing said conversation group, such that users of hearing aids included in said conversation group can converse with one another via said shared wireless communication unit.