Delcamp.us is a really cool site for anyone interested in Classical Guitar. They have just started up there free lessons which include lesson material, video, discussion boards and more. I am starting these ASAP and it’s a good time to start since they just fired this up for the year.
In all it contains 4 years worth of program, users may enter at the level that suites them but they correspond to a normal 4 years worth of musical training. Users have to actually record there lessons and upload them for critique, as well as enter in final examinations/rehearsals, where they are critiqued by others.