A gap exists between the relationship-building potential of traditional Web sites, the objectives of public relations practitioners, and the actual design of organizational Web sites. This study extends the investigation of online relationship building through a content analysis of 50 environmental weblogs. A comparison of weblogs to traditional Web sites suggests that weblogs incorporate dialogic communication principles to a greater degree than traditional Web sites, potentially making them better suited for online relationship building. (C) 2007 Elsevier Inc. All rights reserved.