How to provide a category specific feed using Blogspot or Blogger
Set up a category
Accessing the category's feed
To access the blog posts in that category, start on your blog's main page. Look for the navigation menu's Categories link, and select the name of your new category. That link will lead to a URL that looks like this:
The RSS feed for that new category can be found at this URL:
This category specific feed is the one you should use for the Planet, rather than the feed for your entire blog. By adding a category to your Fedora-specific posts, you can continue to post whatever content you like on your blog, but can indicate on-topic and appropriate material for the Fedora Planet by using the Fedora category you just set up.