"One day everyone will rely on Dong Resin's Joint and MetaFilter". Along with other, less interesting sources. This seems to be the gist of this recent Online Journalism Review column by Mark Glaser. And it sounds good to me. So the question is: what danger is there of what we take to be parochial and almost private actually going mainstream? Is MetaFilter still a secret? What is lost and what is gained if it suddenly goes mainstream on us?