The abstract says it all, and brilliantly:
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. It’s pithy and just amazing, so so says me!