[sri]

there is lots of content (mit open courseware, lectures from many universities in iTunes, free books being released online) available for self-learners.

is there a "virtual university/classroom" website that helps different people to study together?

something simple & free -- like craigslist.

[jauco]

http://www.lecturefox.com/

[corecirculator]

if it doesn't exist already, its a good idea for a startup.