A system for providing a visual representation of electronic, on-line journals, such as those generally referred to as "Weblogs" or "Blogs", that uses a treemap display object in a graphical user interface to represent social networking characteristics discovered in, and aggregated from a set of on-line journals. The generated display object includes on-line journal representations shown within the social network communities to which they belong. This visual organization is provided through a treemap representation, in which an enclosing region for a set of journals is broken up into sub-regions corresponding to social network communities. Representations of individual on-line journals are provided as inner regions within the sub-regions for the communities. The enclosing region, sub-regions and inner regions may be rectangular, or any other specific geometric shape as appropriate for a given application. The relative size of an inner region representing a specific journal may be determined based on how strongly related that journal is to the other members of the community, or on how active that journal is in terms of reads or writes, or based on some other criteria.