Date: 02/06/07 (Webmaster View)    Keywords: web, google

Want to find who links to your site? Google says:

Now you can use webmaster tools to view a much larger sample of links to pages on your site that we found on the web. Unlike the link: operator, this data is much more comprehensive and can be classified, filtered, and downloaded.

Source: http://www.webmasterview.com/tools/googles_backlink_checker