Best short appreciation that I've seen to date is from Robert. This is the key extract:
Use Memeorandum. Find any story that interests you. Now turn on Memeorandum's blog search (click preferences at the top of the page and check "Show Link Search" and click on "Done." Now, under each top headline you'll see an entry for "Link Search" that includes links to Google, Bloglines, Technorati, and Ice Rocket for JUST THAT ENTRY. This is killer because now you can really dig into the long tail (you know, those blogs that don't have many people linking to them). … Google's new entry didn't change my behavior the way that Memeorandum did.
