Arizona:
State Bar of Arizona Ethics Opinion 05-04: Electronic Storage; Confidentiality
State Bar of Arizona Ethics Opinion 09-04: Confidentiality; Maintaining Client Files; Electronic Storage; Internet
Iowa:
Iowa State Bar Association Committee on Ethics and Practice Guidelines: Ethics Opinion 11-01: “Use of Software as a Service – Cloud Computing”
Maine:
Maine State Bar Professional Ethics Commission: “Client Confidences: Confidential firm data held electronically and handled by technicians for third-party vendors;” Opinion 194
New Jersey:
New Jersey Bar Advisory Committee on Professional Ethics: “Electronic Storage and Access of Client Files;” Opinion 701
New York:
New York State Bar Association Committee on Professional Ethics: Opinion 842
New York State Bar Association Committee on Professional Ethics: Opinion 820
North Carolina:
North Carolina State Bar Association Proposed 2011 Formal Ethics Opinion 6: “Subscribing to Software as a Service While Fulfilling the Duties of Confidentiality and Preservation of Client Property”
Pennsylvania:
Pennsylvania Bar Association Committee on Legal Ethics and Professional Responsibility: Informal Opinion 2010-60 unfortunately is only available on line to Pennsylvania Bar members. However, the Spring 2011 issue of At Issue – a publication by and for the Young Lawyers Division of the Pennsylvania Bar Association has an article discussing that opinion: Cloud Computing 101 for Lawyers (pg 8)
Oregon:
Oregon State Bar Association Formal Ethics Opinion Number 2011-188: “Information Relating to the Representation of a Client: Third-Party Electronic Storage of Client Materials“