Someone please tell me why we need Brainify.com. Brainify is yet another social bookmarking site and joins the likes of del.icio.us and ma.gnolia. What is the distinguishing feature of Brainify? It is restricted to people who have a .edu e-mail address. Say what! Yep, it is a restricted social network. In the off-line world such things are called clubs and popular opinion is that clubs are composed of like-minded individuals. I’m pretty sure that restricting something to like-minded individuals is bad and stifles growth and exploration. So why in the world would someone want to develop such a site when we have open communities like del.icio.us and ma.gnolia? You can read more in the Chronicle article.