A total of 55 weblogs maintained by libraries were identified in late 2003 using Internet search engines and directories. The weblogs were studied using content analysis techniques. Library weblogs were found in just three countries, with the majority being in the USA. Public and academic libraries were more likely to have a weblog than other types of libraries. The most common aim or purpose was to provide news, information and links to Internet resources for library users. Few provided interactive facilities, and when provided, there was little evidence that the facilities were used to any extent. Only one-fifth of the weblogs had been updated within the past day and only half within the previous week. Less than half provided an RSS feed. Given the small number of library weblogs in the study, the question of "why so few?" is discussed. Finally, the article addresses the implications of the findings for library managers.