Lack of blogging, and a thought

A quick check at the posting dates for the last few entries in my blog confirms that my blogging rate has fallen off recently. The interesting thing is that I’ve been contributing as much to the blogosphere as I usually do; it’s just that I’ve found myself contributing a lot of comments to other people’s blogs.
And this provoked the following thought. Presumably, people that visit my blog do so because they are interested in what I’m writing about – atheism, science, philosophy, software, aviation, music, the family, whatever. And most of my recent comments have been about these very subjects. I wonder if there’s an easy way to weave these threads together: to post a comment on, say, Secular Philosophy, and have the same material show up here, decorated with just enough contextual infirmation that you could decide whether you wanted to pop over to the story I had commented on and read the whole thread.
If we all used the same blogging software, I could imagine ways of implementing true “multiple inheritance” of blog content. Absent standards, this is likely to be a manual process for a while. (Or can Digg or Feedburner help out, perhaps?)