I have to survey this topic but I can't find useful articles which are academic. Also, I have to answer this question - what are the standards and format of rss feeds? thanks
I see the relationship between collaboration frameworks and RSS feeds as follow: collaboration frameworks provide support to rss feeds as a way to communicate (export) updates of something or to import communication from other systems. Here is a list of three academic papers somehow related to collaboration frameworks or the use of rss feeds to create systems.
Evaluating Web 2.0 Services Based on 7C Framework
A Framework for Flexible User Profile Mashups
The answer for you last question you can find in this link: RSS specification.