Color code users?
This came up regularly when a group was annotating: users were saying that it would be helpful to visually distinguish more clearly between annotations made by different users. I don't know what the color of the username in the main menu was intended for but maybe this was already going into such a direction. No matter if users can choose a color themselves or just get a random color, it could be used in the Annotation stream (Post-Annotator and Live-Annotator) to fulfil such demands. But I think it needs to be discussed. I also remember that Anton was somewhat critical of the use of such colour codes.
Here is one photoshop sketch of how I could imagine it to look like, but I'm not a designer: