Abstract: To address problems related to interface differences and disunity among on-line services, such as newsgroups message boards and forums, the present inventors devised systems, methods, and software for automating the posting and retrieval of content across different on-line services as well as encouraging growth of active on-line communities. One exemplary system includes a posting module, a retrieval module, and a web server. The posting module allows users to create and initiate data postings that are sent automatically to several newsgroups, message boards, and/or other on-line information sources. The retrieval module automatically retrieves replies to the postings at each of the on-line sources and presents them through the webserver for user review and further reply, eliminating the need for users to repeatedly visit posting sites in search of reply messages.