Using AllianceWeb, authors distributed around the world can cooperate producing large documents in a consistent and concerted way. In this paper, we highlight the main aspects of the group awareness function that allows each author to diffuse his contribution to other co-authors, and to control the way by which other contributions are integrated into his environment. In order to support this function, essential to every groupware application, we have designed a self-adaptive cooperative interaction environment, parametrized by user preferences. Thus, the characteristics of an adaptive group awareness agent are defined.