1. Download link icons: http://www.alldrupalthemes.com/sites/www.alldrupalthemes.com/files/basetheme/icons.zip
2. Unzip in this folder  (Extract>here)

These extra steps are needed because the famfam icons are not GPL and cannot be hosted on drupal.org, if you know of any cool GPL or public domain mime type icons, send me an email: http://www.alldrupalthemes.com//contact