Blogstorm is a new service allowing you to track the number of websites linking to your blog posts or news articles.

To use their service you have to:

1. Download a PHP script
2. Get a Yahoo API key
3. Sign up at the Blogstorm website

I haven't signed up yet because that seems like a few more hoops than I want to jump through right now. It might be a good service for anyone that wants to keep track of back-links though.