How to add Facebook Connect, social login such as Gmail login, Twitter login, etc on JomSocial?
Check out this Social login and social share plugin(http://extensions.joomla.org/extensions/access-a-security/site-access/authentication-cloud-based/19293). it works fine for me with K2 and it says that it supports Jomsocial, Joomfish, CB and others. I am totally satisfied with this and their support makes the experience too good