The journalist Mercè Molist visited us this summer, and wrote an article which has been published at El Pais, both in paper and web format, in the CeiberP@is weekly supplement dedicated to tthe technologies. El Pais currently the most sold newspaper in Spain.
Link to the article at El Pais web site (Spanish).
She also published his original text at her blog (Spanish).
That is am undestrandeable article where she exlains quite well the "what" and "how" about guifi.net, and also provides some real world examples of the network usage by the users.