I kept mine. I worked in the bridal salon so the Monday after we returned home from Hawaii I dropped it off to be cleaned and preserved. It has been boxed for nearly 4 years now. There's a viewing window, but I haven't looked at it.
I would never make Sarah wear my dress, and though I would probably offer, I think I might prefer she get her own. What am I holding on to it for? I would never do a trash the dress party, but I don't know if I should keep it. Did you keep yours? If you didn't, what did you do with it? Did you feel guilty getting rid of it?