This is something I had already been thinking about for a couple of years. Since LL said that they would only release an account if it's in the deceased's will, I had been planning to write a will and include something about it there.
But my sister brought something up when I chatted with her today. She brought up the possibility that I may still be alive but incapacitated somehow. How do I let people in SL know?
So, during the past few hours, I've started a document that only she and I have access to, and she promised not to read it until I'm incapacitated or dead. It contains a list of people to notify in either case.
She also knows to give people the option to know my RL identity (as well as the names of my other alts) *after my death*, if they don't know it by then. It is an option because once-lovers might choose to preserve the fantasy. Of course, the option would also be available to friends.
Okay, enough of the morbid thoughts....