What I would like is the circles feature to encompass this, so that you would have the equivalent of Twitter wide spread for instance a circle on Node-JS, a music circle which I share with friends as previously mentioned and another wider circle of friends which is more like facebook, a more general taste circle. I think this makes a lot of sense, and I want these groups to be explicit, I don't particularly want any groups to be "We thought you might be interested in Penguins seeing as you are in the Linux group"