Dennis Callahan has a most interesting Posterous site, called LearnStreaming. His latest post shows this graphic, which I find reflects many of the concepts of personal knowledge management, but with some additional aspects that may make it easier to understand and do:
Dennis has a clear and simple definition for Learnstreaming – publishing your learning activities online for the benefit of you and others. This is the basis of many blogs in our field and learnstreaming continues to expand with all the new applications such as micro-blogging, social bookmarks, and “life-streaming” platforms like Posterous.
Using a related concept from Jay Cross, I would say that learnstreams are the water that allows learnscapes to grow.