Personally, I team up in some European projects with e-journals, e.g. MagazineFactory.
I would be glad, if Ning could install an e-journal as a feature for every social network. Each member could write and publish articles. It´s good to have a lot of competent friends and to discuss some issues. But I´ld like to get more possiblities to start interactive collaboration on special topics. What is your opinion about writing articles as to topics?