While this isn't specifically related to Open Source Software and Usability, I think it's great that edX and LF will help make Linux training available to everyone. From the edX site: "Upon completion of this training you should have a good working knowledge of Linux, from both a graphical and command line perspective, allowing you to easily navigate through any of the major Linux distributions. You will be able to continue your progress as either a user, system administrator or developer using the acquired skill set."
Classes start in August (2014). edX expects that students would spend anywhere from 40 to 60 hours to cover the course content.