I've just finished creating a public site for our chorus using Groupanizer. We've been using the chorus member features for about 6 months now and finally decided to migrate our public site as well. The whole process took about two weeks, although the bulk of the content was ready in just a day or two. If there is any interest, I'll be happy to post some details about my experience, being a complete Drupal newbie when I started.
In the meantime, feel free to check out the site at www.HeartOfMaryland.org. I welcome any questions, comments, or critiques.