Oh, yes! We have done that (exchange passwords) and we both know which are our wishes regarding... well, everything. But I still have set a Will of Life, when I clearly set the point when I want the plug pulled off. I don't want anybody else having to deal with that kind of decisions.
We are both very... online-ers? And we both value a lot those friendships we have with all these people whose faces we don't know, but their hearts, oh, yes! Their hearts we really know *smiles*