I had a crash of my own last May, so maybe I can give you some ideas from a patient's point of view. I'm single, and I was lucky in that my mom was able to come to Boston and be at the hospital with me - nothing like a 52-year-old relying on her mother! Your friend's situation is probably different in that she is likely supporting her husband in a familiar place. I have to agree with SadieKate that being there for your friend is the most important thing. Going and sitting with her when she's not in intensive care (since they probably won't allow additional visitors) and bringing her food so she doesn't need to leave the hospital would both be helpful and provide the emotional support that she probably needs.

I had friends and neighbors who really jumped in and helped - the neighbors by taking care of my newspaper and mail and managing to convince the state police that they should give them my bike so I didn't need to worry about it, and my friends by picking up clothes for me at my house, bringing food to the hospital for us since the hospital food was pretty much inedible, and most important - visiting me both when I knew they were there and even at the beginning when I was pretty much out of it.

I'm sending my good wishes to your friends.