http://google.com/search?q=Wikify+Username+Handling
If we create a memory-friendly Username like in this example (where I created
http://debategraph.org/WikifyUsernameHandling), I suggest that DG should do the following:
Create the Username, if there is none;
otherwise create a direct crosslink (visible in both directions) to the existing map, that has already that username.
This way we can better find collaboration with already existing projects, an effect that is called
Google:AccidentalCollaboration or
Google:IncidentalCollaboration.