I would like to use a decentralised social network for RSS feeds I'm interested in. It doesn't have to be perfect, it only has to be better than what I'm currently using which is a polling system that periodically checks for new items within each RSS feed it has subscribed to.
Here's an example where I have replaced the services with people to help explain the concept:
You can see that there isn't much too it, yet that's all that's required. Sue is notified of Bob's status update within seconds, and anybody else can also be notified of Bob's status update providing they are subscribed to Bob's feed.