In the older version of Sonar, there was a Dependencies or 'Library cartography' page, but I can't seem to find it in 5.2 - anyone know where it might be?
http://www.sonarqube.org/sonar-2-1-in-screenshots/
http://docs.sonarqube.org/display/SONARQUBE45/Managing+Libraries
The reason/usecase was to have a single location when there may be a library (commons logging like the example, or commons collections when there is a vulnerability for example) to find all projects that contain that dependency.