UPDATE (1/2012): BackTweets has been acquired by Twitter and the service is no longer available publicly.
If you’re at all serious and savvy about using Twitter as a marketing tool, you probably do regular searches for mentions of your brand, using Twitter’s own search tool or one of the many third party tools available. That’s a good thing to do, but you’ve probably been missing a significant portion of Twitter refrences to your brand: those with a direct link to one of your sites but no mention of your brand in the text.
Enter BackTweets. Enter your base URL (e.g., http://www.yoursite.com) and BackTweets will find any link to that site posted on Twitter. Good news: BackTweets can “see through” shortened URLs. You can also search by hashtags (#tag) and Twitter handles (@virante).
Any URL search you create with BackTweets has its own RSS feed so you can keep track of new linkers. To get that in your email, submit the RSS to FeedMyInbox.