The open-source Sweetcron project is currently the single best self-hosted lifestream application because it fully archives your aggregated content by writing the full content to your own MySQL database. Regardless of where you create your content, if you add the full feed to Sweetcron, it will archive it. In other words, even if Twitter closes its doors, the full content of your tweets is preserved.
Coming to www.andrewcurrie.ca next month!
