The abstract says it all:

This paper was written for judges to assist them in understanding: their obligations concerning Facebook and other social networking sites, including “friending” lawyers; the confidentiality of email, texts, and other e-communications; the use of the Internet by lawyers to research jurors or potential jurors; the use of the Internet by judges to research the facts and law; and how to admonish jurors not to use the Internet to research the case before them or to discuss it prior to deliberations.

The full paper is here.