Link Radar reports new inbound links from other websites to your own site(s) based on your Google Analytics data. As soon as a website refers a visitor to you (and has never done so in the past) it will show up in Link Radar with the exact URL.
What's new in version 1.0.1
You can now delete links from the list and you can add links yourself from any browser via a bookmarklet. That's useful if you discover a new link to your website before it gets reported in Google Analytics and you want to make sure to keep it.