PostRank claims to measure social engagement, including blog posts responding to someone else, bookmarking an article, leaving a comment on a blog, or clicking a link to read a news item.
The challenge for Friendfeed and the like is that while I really like all my services gathered in one place, I would rather that these would be centralized on my blog instead of a third party service. Yes you can cross post or add badges, but it's not rea
fav.or.it is our answer to the current separation of feed reading and commenting. We have built a web interface that lets you read all your favorite content and at the same time take part in an interactive community.