Open systems: Medpedia
In an email, Alan Herrell points to Medpedia:
Welcome to Medpedia
Medpedia is just getting started. It is a long term project and is not yet a comprehensive resource. See what is already available and how you can add to it.
Medpedia is applying a new collaborative model to the collection, sharing and advancement of medical knowledge that, over time, will produce the world's most comprehensive resource.