Telling her all about the obvious ie skype, facebook etc isn't going to make a scrap of difference right now. Your friend is understandably devastated and no doubt feels that half her life is disappearing over the horizon but she will adjust in her mind to the situation... it could take a short while or it could be a long time. All you can do is be there for whatever it is you normally do together...treat her normally but with allowances if you know what I mean.
I speak from experience, my son & family went to Australia 3 years ago, he recently came for a short stay on his own and it was even harder than the first time when he left again. I miss them all, the children are growing up far away but can only be thankful I have a confident, successful and hopefully happy son who's taken a massive step, I wish I had his confidence.