The social web is replete with self-organizing spaces. Take Wikipedia, for example.
Exploration, experimentation, taking risks, 'what if?' questions and making errors, are all essential elements of self-organized learning. However, probably the most important component is the ability of the learners themselves to direct their own learning, and to be able to call upon the resources they need, when they need them. We can learn a lot from Wikipedia, and not just from the knowledge it contains.