Ask HN: Any good graphic/web design courses online?

I'm a backend developer who's seen a lot of quality stuff for teaching programming, for example: * CodeSchool * Udacity * TeamTreeHouse * OpenCourseWare (MIT, Stanford)

My Googlefu is letting me down so I was just wondering if the community knows of any similar resources for designers to hone their craft since I'm not really versed in that community?