Social Computing & Networking is an IEEE conference for those interested in how computers can affect and support social engagement. It is distinctly biased to the computing end of this spectrum and tends to have a lot of stuff concerned with social network theory and similar issues, but it covers some broader and more human-oriented ground too. The paper submission deadline is August 25th and the conference itself is in Sydney Australia, Dec 3-5 this year.
Address of the bookmark: http://www.swinflow.org/confs/socialcom2014/