You can read and download this EU elearning paper that examines the 'new learning' we know as online learning and describes the ways in which social media is helping to re-define learning scenarios and activities.
English Out There teaching and learning materials, to our knowledge, are pretty much the only ones that currently tick all of the boxes in this report. They do that because they focus on the user's learning experience with the language, not on the technology. This makes them highly flexible as well as being highly effective.
(compliments of Languages Out There)