It actually sounds awesome that Digg is behind it.

I can already picture the frontpage of Digg made of posts that were most liked by individual users on their RSS feed. of Comments on Digg about the RSS item.

Anyone sees this as a huge potential? You don't need to post anything, you just need to like your own rss feed and posts gets promoted. You can check comments in case other users are following the same rss feed as you etc...