Well, I think for future releases we need Feeds module which would provide RSS and Atom output and consist of:
[list=1]
Pages and Lists
- Category feed (pages in category and its subcategories)
- Page feed (comments for page)
Forums
- Category feed (topics in forum and its subforums)
- Topic feed (posts in topic)
Plugins (hooks to create feed generators in plugins)
May the Source be with you!