I've integrated K2 with JomSocial and members are able to submit an article to the site. How can I use JomSocial to be able to approve those articles and also contact the users about those articles easily? Any pointers on capabilities and suggestions on the best way to go about this would be very helpful?
There is not direct integration between K2 and Jomsocial and if i understand correctly what you are wanting to do would require a lot of custom development work. The only thing i can suggest is to contact a developer to have the integration build for you.