Hey Bruno, 

maybe this will also be useful: 

https://github.com/elleros/courseraforums

http://www2.cs.uh.edu/~gnawali/papers/coursera-iri2014-abstract.html

Hello Bruno,

Check this link it may help you : http://datastage.stanford.edu/

Best of luck

Thank you all for the feedback.

@Irene, this dataset is great. But I was interested in two additional information: user information, especially nationality (as in @Mariela dataset) and the posts content. Do you know of any kind of this expanded dataset?

@Jihane Thanks for this link, but I'd like something more ready to an exploratory research, with direct access to the datasets.