[At TUG 2011 Stefan Kottwitz](https://tex.meta.stackexchange.com/questions/1915/going-to-a-conference-the-tug-2011-experience) made [a presentation of TeX.SX](http://tex.blogoverflow.com/2011/10/bringing-together-tex-users-online/) which is relevant in converting mailing list users. It includes a comparison of different communication forms and lists some advantages of TeX.SX.