I've been following the Medpedia project for some time now. It appears that Medpedia is dead. Am I wrong? Did the site get hacked? Or, did it die a quiet death?
What happened to Medpedia? It's a project that had such potential, but perhaps they didn't have enough resources to sustain it.
Medpedia was a collaborative project launched on 17 February 2009. Its aim is to create an open access online medical wiki encyclopedia in association with Harvard Medical School, Stanford School of Medicine, Berkeley School of Public Health, University of Michigan Medical School, the United Kingdom's National Health Service (NHS) as well as other contributors.
Looks like @laikas has captured some information about the death of Medpedia.