Allows creation of new drupal sites from a central drupal site without the creator having access to database info. The new site is installed either in the same database with a different prefix or if the drupal db_user has access to create a database and grant privileges, then possibly there.
If you are looking for inter-related sites, this module will not achieve this alone (see ogsite). This simply makes it possible for users to skip the typical drupal installation process (entering the db user/password), making it possible for non-admins to do this step.