The communication center is a Notes (composite) application that allows easy access to several communication/messaging applications, e.g. Twitter, Google Mail, Yahoo Mail, Facebook etc.
All widgets in this application can you single sign on via the Notes credential store.
This application can be personalized via the Composite Application Editor. For example you could delete one of the widgets if you don't need it or add your own Notes mail inbox to it.
Pierre Carlson is the developer. Niklas Heidloff only the committer.