Online learning covers a wide range of technologies and formal and informal learning methods. A key factor promoting the significant enthusiasm for online learning across all education and training sectors in Great Britain and elsewhere is its potential to overcome many of the barriers of place, pace, and time that socially and economically disadvantaged adults face in accessing learning opportunities. The following are among the online learning issues that must be addressed when establishing online learning programs: online learners' characteristics and needs; tutorial and other forms of support; wider participation; collaborative learning; vicarious learning; design of materials; learning to learn; characteristics of different approaches; moderating and facilitating; location of access; costs and benefits; and retention. The following social issues must also be addressed: socially excluded communities; Internet access and use; learners' attitudes; online communities; informal learning; teleworking; digital democracy; access to knowledge; barriers to online learning; information and computer technology and families, communities, learners, and organizations. Despite the extensive activity that is occurring in relation to online learning, many gaps remain in our understanding of how to realize its potential. Developments must be accompanied by evaluation and dissemination to ensure that practitioners have access to the latest information. (Contains 12 tables and 97 references.)(MN)