BackTweets – Search For Links on Twitter
BackTweets gives you the good tweets that link to your posts, though the links are shortened or not. Most of the tweets contain your post title – ignore those and only show the good ones.
How does it work is simple just enter a URL and hit return and you can see the reverse-chronological list of tweets containing the requested link. Here BackTweets takes URL as an input and is going to display all the tweets that links to the URL that could be either directly of through shortened.
RSS feed of BackTweets notifies automatically whenever the new relevant tweets appear. To get updates via email all you need to do is to enter feed URL into a service such as FeedMyEmail.
Backtweets provide up to 500 results for any single search result at one time, and searches for links going back about 2 months.
Features:
• supports regular and short URLs
• real-time updates
• subscriptions (e-mail, RSS)
• API available
convenient functions those are provided by this site are:
RSS feed and email alerts for searches
bookmarklet for quick access
embeddable widget and WordPress plugin
API for developers (free, but requires registration)
Backtweets is currently working on BackTweetsPro version and this includes URL history, site pages, audience profiles, and more. .
The people who are linking to your content on twitter can be effectively discovered, tracked and engaged.
Go4 BackTweets


Nice service. I used API to create WordpRess Widget. It adds backtweets to sidebar
http://en.tigor.org.ua/wp_twitbacks/