linkrdr is a Web app with goals similar to Amethyst and a very different implementation. I have been using it off and on for a week, mostly shadowing what I’ve already read in Amethyst. The linkrdr team is making rapid improvements. Between the two, it’s starting to reflect my interests. I’m still thrashing about a bit, not understanding what some of the links do. I’m not sure what the icon at the far right does and how that is different from opening up the item (clicking on the greater than sign at the far left or the title) and clicking on the links there.
I’m not ready to abandon Amethyst yet. Nor linkrdr. If you are interested in a smart RSS reader, give linkrdr a try.