This blog is about blogging, and I suspect that a few of you have subscribed to one or more of the feeds that are provided here. I use a number of feeds, too, in this blog - look in the sidebar.
When your blog has an activated feed, every label search can be accessed as a feed. You can subscribe to one of the topics related feeds here - maybe my Labels feed, or my internationally relevant topic - Languages.
You can include subject feeds from other blogs, too, using custom feeds published by services like FeedBurner.
Just decide what you want, and use your imagination.