At DNUG I attended the session Activity Stream – how to feed the beast! from Andreas Artner. He presented how to use IBM Tivoli Directory Integrator (TDI) to read updates from various sources, e.g. Notes or SQL databases, and how to put them into Connections. TDI can be run on a scheduled basis or be triggered via events. Via this mechanism you can add notifications from existing applications to Connections without changing the applications.