Please allow the Admin to set a brief description for each widget which would be available to the user as a mouseover or popup link from the widget itself in the project dashboard.
This allows the Sonar interface to be more transparent to the user & less a source of mystery and confusion.
Instead of every user in an organization going through: "LCOM4? What's that. Wonder what Google says..."
It would allow the admin to do the research once on the widgets (s)he has chosen to include on the dashboard & present an explanation of what it is & how the org is using it.