Judi,
The first thing I would recommend is working with what you have, by which I mean not trying to change these people; I know from experience that when people are extremely uncomfortable engaging in that way, trying to force it doesn't work. That said, I think it makes good to sense to have them make the most of their online connections via social media (Linkedin, Facebook, etc.) and email--reminding them that there are many people out there who are uncomfortable with face-to-face networking and utilize the internet instead. Also, have you done any group outings to job fairs, or… >>>
