Best Sources of learning all about using DRUSH in Drupal

Slowly but surely I have come to a stage and after a lot of struggle where I think I am ready for DRUSH now... part of the challenge has been knowing that very good documentation exists everywhere on the internet that is yet unexplored... and then knowing where it is... and then to filter out the better sources of newbie learning from the could-be-better ones... So here is the list of my favourite sources of learning about DRUSH for a newbie...

1. I think one of the best short and crisp and a very newbie introduction to Drush is on this article, "An introduction to Drush: The Drupal power tool" by James Sinclair. This I feel is the best starting point for DRUSH. This article will tell about:
• Why DRUSH and things you can do ? It also highlights the use cases DRUSH is applied to and basically convinces you that this is really the thing you have been missing so far.
• It shows you the newbie level commands in a nice tabular fashion with short and crisp explanation.
• Shows you how to use DRUSH to run drush commands on remote drupal website by running them on your local machine.
• Shows you how to use DRUSH to run one Command on several remote websites with the execution of just one script. Say for example, take a back up on several remote websites with execution of just one script on your local host.
• The best part is that it is in TEXT. It happens with me at least that sometimes I miss out some critical parts when trying to learn directly from the screencast. Especially an absolutely a new topic like this one. Prefer to read at my own pace and use eyes to find and re-read points I may have missed out. This is a long replay in a video file and there is no search there as well.
2. For those more comfortable with the video learning, I think Natalie's screencasts are a wonderful resource as well.
• These writeups and screencasts introduce the next level of DRUSH commands in a very simple and a nice way. 
• It is easier to follow this screencast after reading the above article.
• There are several screencasts here.
• This website has several excellent tutorials and  screencasts on the following topics as well.

• Drupal Performance

  Testing and improving the loading speed of Drupal through caching and server configuration

  Drupal setup and administration

  From beginners to novices, there's always something new to learn in Drupal configuration and setup.

  Theming Drupal

  Theming how-tos, including integration of Photoshop and Fireworks and tips on HTML and CSS.

  Useful modules

  Views and CCK might be the most famous contributed modules for Drupal, but there're tons of others that can make Drupal development and administration much easier.

  Developing Drupal

  Tips to setup Drupal development environment to facilitate theme and module development. Create new websites faster!

  Security

  Your site is is only as strong as its weakest link. From webserver to user management, let's make it more secure.
3.  The whole list of DRUSH related commands are found here.
4. This is the official drupal.org project page for the drush project.
• Here you will also find the list of Drupal modules that support Drush integration.
5. This is the link for the Drush installer for windows . There is an installation guide there as well.
6. Other valuable resources for learning drush on the drush.ws website are on this link.
7. Another great article that takes Drush and RPC and Aliases one step further...

2. Next level of introduction