Some mentioned Bruce Willis earlier and
no he didn't sue Apple for the right to bequeath his iTunes library. However googling that led me to
this, which I found an interesting read. I'd actually been thinking of appointing a "digital executor" i.e. leave a master password with a friend.
The message seems to be if you want to leave digital media to your family the best way to do it (currently) is to make sure it's loaded onto some device. So I guess those people who want ereaders with large memory and/or SD card slots have it right