Dr Steven Warburton presented on design challenges for future learning environments that leverage social software. He discussed transforming bibliographic references and course content into social objects that can be commented on, tagged, and discovered through tools like Bibsonomy. Warburton also examined scaling learning through a distributed toolset that integrates personal tools and content across emerging technologies. Key challenges addressed leveraging models of virtual learning environments versus personal learning environments and understanding changing learner and educator roles and blurring formal and informal learning spaces with tools like educational blogging.