One Internet, multiple worlds. People have gone mobile, but iMechanica has not. Although iMechanica is accessible from mobile phones, but it was not designed as such. On the other hand, mobile social networks are good mostly for short forms. A practical solution seems to be posting on iMechanica and linking the entries to social networks, such as twitter, wechat, and Facebook. For example, The New Yorker has a strong presence on Facebook, as my sons and their friends would say.