I have against better judgment decided to teach a new course in the Spring of 2014. I have since 15 years or so taught a course on "Design Theory" mostly for master students. That course has become a bit less theoretical in the last few years (but it is also much better as a course!). The new course is a small seminar (maybe 6-12) with the title "Philosophy and Theory of Design". It will only be open for PhD students and interested colleagues, and only after permission from me :-) We will meet once a week for 1,5 hour, read good texts and discuss. I will also now and then give shorter "lectures" during these meetings. I don't know if anyone will sign up for this type of course, we'll see. I am looking forward to it, and if you are interested, write to me.
(I am as usual also in the Spring teaching a course on "Experience Design")