Lots of organizations that are doing Occupy events have blogs and therefore have feeds. But some are relying exclusively on Facebook, and those events can't be part of a RSS-based information flow. 

It's really easy to get a feed. One comes for free with every blog. So if you have a Tumblr or Wordpress blog, or any other popular blog flavor, that's all you need. Even if you're using Facebook to communicate, it's helpful if you can broadcast the big news to the non-Facebook world by adding it to a blog that lives outside of Facebook. 

Facebook is the equivalent of Wall Street in the tech world. So it's important that you communicate not just with people inside Facebook, but those outside as well.  

If you have questions, feel free to post them here.