This is at least a step in the right direction. The Michigan Senate has introduced a bill that would require those holders of our electronic accounts (email, facebook, etc) to give access to those accounts to Trustees of a Trust. The bill also ties in the same requirements for Personal Representatives of your will, and even an attorney-in-fact of your Durable Power of Attorney.
This is a good start, but what we really need is Federal Legislation, so that we don't eventually have 50 states with 50 different laws covering such access.