My condolences to you as well. I'm so sorry for your loss. I feel like my daughter's Facebook page is acting as a virtual grave site, where people can go and "talk" to her. And it's nice to be able to read what other people are writing on her wall.
My daughter died 2 months ago in a car accident. Many of her family and friends still post messages to her Facebook page telling her how much we miss her. I'm not sure if it's helping or hindering the grieving process, but at least for me, it's been nice to hear from all the people who loved her. Some share memories while others just say they were thinking about her. There have been links to YouTube videos of sad songs, sappy (but sweet) poetry, and slideshows of her. At least for now, I can't even bring myself to delete her from my contacts in my phone, let alone delete her Facebook profile.