Search for your site URL and the results displayed will un-shorten all shortened links in tweets that link to your site. It does not matter what URL shortening service someone uses when tweeting about your site, BackTweets will resolve all shortened URL’s to display the ones pointing to your site.
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.