There may be better ways to do this, but suppose you want to get Aegir to provision a lot of sites, maybe from a list you've got in CSV file, then you can now use Feeds! The Aegir feeds module exposes the key details to feeds, so that it can create site nodes. Whip yourself up a feed importer preset with the source of your choice, create site nodes and map your values to the...
Aegir is a system for managing sites using Drupal and drush. We use it to manage this site in fact. However, we use a fairly old version. As a precursor to doing some more work on the backup management I wanted to get my head around the new version of Aegir, and the object orientedness. There's a really useful tutorial over on the Aegir community site: http://community.aegirproject.org/node/75 That shows you how to add options to...