I know we have the Linux FAQ sticky but I thought I'd share this page which I just stumbled upon, as it has some links that are pretty useful - I think the link to IBM's Developer Works site and the videos at VTC University may be popular.
http://degreedirectory.org/articles/Linux_OpenCourseWare_Educational_Site_Rankings.html
http://degreedirectory.org/articles/Linux_OpenCourseWare_Educational_Site_Rankings.html