The importance of informal communication on the Internet has been increasing in recent years. Several systems for informal communication are currently available to the public. These systems, however, require a particular server and/or specialized 3D content. In this paper, we propose a system for informal communication in a 3D virtual environment. The system makes 3D virtual worlds from existing common 2D HTML documents. Browsers communicate in a peer-to-peer manner. Construction and management of the system can be achieved with ease and at low cost in contrast with existing 3D virtual communication systems. Our results show that users shared interests by gaze awareness.