Public-Facing Site and Sub-Domains

Drupal "distributions" are pre-configured sites contributed by the Drupal community.  It makes sense to split an unwieldy public-facing site into sub-domains to support particular functions (for example, a project management site with Open Atrium, a forum site with Drupal Commons, a conference site with COD). The public-facing site for is listed below, along with its two Drupal-based subdomains: Drupal Commons (emulating and a custom Learning Content Management System.