I just spent the day completing a Lynda.com course. I just completed the "Simplified Drupal Sites with Drush" course. The Certificate can be viewed here. It was a very good run-through of Drush basics. I feel a lot more comfortable with Drush. Using Aegir I have had to become a bit more comfortable with it and this course has simplified my making use of it. Now that I have completed the course I do wish I would have known more about it earlier on. If I had more of a familiarity of Drush I probably would have avoided Aegir at this point in time. Drush simplifies a lot of the Aegir functionality with a great deal more simplicity that working on getting Aegir up and running. In hind-site I would have been a better use of time to avoid the Aegir debacle and concentrate on Drush because Drush GREATLY simplifies the functionality that Aegir offers (but with less headache than trying to get Aegir up and running). Now to get focused on putting together website (before Aegir hiccups again) LOL!!!