This week I posted the last episode of the epic learning series "Four weeks of Drupal". It contains 99 parts, from "What is Drupal?" to "Providing new entity properites" and can be found over at the NodeOne learning library.
Drupal 7 can be used with Varnish and other reverse proxy servers if configured correctly. This blog post highlights how you can control your cache with Drupal, the Varnish module and the Cache Actions module.
Make-files are really powerful to use when your work in developing with Drupal with profiles. In the make-file you can download specific versions of modules, and patch them if you need, to easily set up a site.