Now this is interesting and will have pretty far reaching implications if it holds up.  This ruling (via Information Governance Engagement Area) by the Idaho Supreme Court says that email exchanged between government employees is a public record.

"The e-mails are public records and not exempt from disclosure under either statutory exemptions or constitutional law," the court said in its unanimous five-justice opinion.

"The e-mail’s content is related to the public’s business because the public’s business includes job performance by a county employee, the spending policies of a county program, the issues surrounding that program’s demise. . ."

"…the high court rejected Kalani’s contention that disclosing the e-mail would violate her constitutional right to privacy, saying Kalani had no reasonable expectation of privacy because of the county e-mail policy that she signed. The policy says employees have no right to personal privacy when using e-mail systems provided by the county and that e-mail messages are public records."