I was not aware of either of these things, having written off digg a long time ago. I'm going to definitely check both out.
You should give Snapzu (http://snapzu.com) a try. We're trying to keep improving on it, so any feedback is welcome!
I used to use Snapzu but forcing users to click a link twice (once to take you to the Snapzu comment page and then again to "Continue Reading") to navigate to the article is awful and probably a large reason people give up on it.
Also, to give credit where it's due: Digg was one of the few places to follow through on the "let's make something better" after Google Reader closed shop...I hadn't used Google Reader in awhile so I've forgotten what features it excelled on, but Digg's reader is the only feed reader I use currently: http://digg.com/reader