C.N.
I had a friend let go and it really stunk. We talked on the phone a few times. When they wanted some more closure they reached out to me. I have kept in touch with all of my friends that were let go(some were pushed into retirement). Some is via e-mail correspondance, parties, what-not. I think they all know that I value them as friends as much as I did co-workers. Also, I would say if you want to suggest to your friend that she can use you as a reference when she is ready to start looking again. I try to avoid talking about work with former co-workers(it is inevitable that it comes up). Good luck!