I'm looking for a solution that will allow a site (by site I'll be refering to SPWebs) to dynamically subscribe to lists and libraries on subsites, and record additions, deletions, and updates of pages and other stuff of subsites. I can add feeds of most of these things manually using the RSS Viewer webpart, however there's management overhead if any content is added or deleted.
Does anybody know if a solution is already available or give me a head start if I need to develop a custom solution?