I got a couple of pointers recently to really cool diagrams showing how groups of technologies and services could be combined to create a socially based system for education, learning, etc.
Check out this diagram from Scott Wilson. He talks more about it here.
Then there is this diagram of a system from CogDogBlog called Ocotillo. More information here.
I'm starting to feel more and more confident that the most valuable systems in the future won't be using individual tools like blogs, wiki, message boards, etc. What may really work best is using a number of resources in the same environment with each one playing an individual role- the role that fits with the needs of the users.
As I've mentioned recently, I'm looking forward to learning more about Drupal, which is supposed to built for this type of convergence.
Thanks to Nancy for the pointers.