Get email notifications as anonymous when new content is posted

It's a pretty common request by clients: As an anonymous user, receive email notifications when new content (by a specific author) is posted on your Drupal site. Existing Drupal solutions don't meet the requirements because they often rely on authenticated users. We already use (and love) MailChimp, so why not use the monkeys to take care of the heavy lifting? We created a new module (currently sandbox/beta) which does precisely that: mailchimp subscriptions. Feedback is welcome!