As a follow-up to their successful Arduino introductory courses, The Hacktory is offering an "advanced" Arduino course. Whereas the first course focused on getting started with Arduino and connecting basic components, this new course will deal with talking to more complicated devices, such as integrated circuits and computers, using various serial protocols.
The course is designed for people who are comfortable with the basic ideas of using the Arduino and are looking to build more complexity in to their projects. Read the announcement here, and sign up here!