No not the kind in the solar system but rather the blog aggregates.
I have joined the world of Planet Fedora. (well, assuming this post shows up correctly.)
After seeing a number of posts on whole feeds versus tags and then which tags to use, I have opted for a tagged feed but am using a planet_fedora tag so I can easily choose to send any content without an otherwise unusual filing system.
Someone asked in irc somewhere about how to get per tag feeds from blogger sites. The parties involved gave up and went to wordpress but I held out and it appears I have the solution.
is what goes into the .planet file.