I have been trying to play with
Blogger BackLinks, and I can say that I don't really like them. I don't really like them because people have to use them! I was expecting Blogger Backlinks to automatically link into the Google Blog search to find a list of all the blogs that link to my post. And then update my page from there.
I think what I will do is develop a version that does use them, it will fire a query off to Google and see what happens from there. I mean, after all Google Blog search allows you to do this, and export the results as RSS.