software called a Planet. Planet software aggregates the feeds of the member blogs to allow people to track many related blogs at once.
Alex Schroeder has an interesting website that been around a long time and combines elements of a blog and a wiki. Recently he setup a planet called Old School RPG Planet that now has several dozen OSR and Old School related blogs feeding into it.
The site has links to explain how to add your blogs to the feed and the purpose of the site.
One of the nice things about the OSR and the current state of independent publisher that the Do it Yourself attitude often lead somebody somewhere to come up with a decent solution to a problem that the community faces. So kudos to Alex for taking the initiative on this and hope that it continues to be a useful tool keeping the connections within the OSR and Old School gaming in general alive.