Here is a summary of FRE 502 which came into effect on September 18, 2009. The rule – which addresses the attorney client privilege and work product doctrine – is intended to provide increased clarity in this confusing area of the law.
The author explains that "[t]he rule establishes a presumption against subject matter waiver, resolve the issue of inadvertent disclosure, provides for confidentiality orders and supports party agreements, among other issues. "
Thanks to Federal Evidence Review.