If you search online, the most common method for extracting a list of subscribers of a Mailman list requires command-line access to the Mailman server. There's a much more user-friendly way to do it via the web interface.
The easiest way is to pull up the roster, which you can do by taking the web address for the admin interface, and substituting the word "roster" for the word "admin". So for example:
Palante Technology Cooperative
Palante Tech Blog: 2012
04.27.2012
Palante Tech will be running at limited capacity on May 1st to allow us to participate alongside our client organizations, allies, and the thousands of others across the United States and around the world organizing for the Occupy general strike and International Workers' Day. We're happy that as a worker-owned cooperative, we were able to bring our shared values and beliefs to this consensus-based decision.
03.22.2012
Palante Tech is excited to announce Benjamin Doherty as the newest member of our cooperative! Benjamin, aka bangpound on Drupal.org and elsewhere online, is a longtime Drupal developer and contributor to Drupal core and modules.