Have you ever thought this would be required? In the paper today was this article....when we fly away to glory...(thats the bright side to lighten up a minute...) ahem...to report someone as deceased, Facebook requires documentation, such as a copy of the death certificate. Then, they will allow memorial messages on the deceased one's wall. And close the account if desired. Gmail wants a copy of your driver's license to grant you access to the deceased one's account. And so on.
The moral of the story seems to be, leave a list of your online accounts, emails, pay pal...and such, complete with pass words for a trusted relative to access. In case. Even then, it sounds very invasive when you have to start giving out your driver's license and so on.
It seems, our 'digital' assets are very real and should be dealt with... when we pass on.