I spoke too soon about not posting anything till January. The Court of Appeals issued a medical malpractice opinion in Geesling v. Livingston Reg'l Hosp., LLC, No. M2007-02726-COA-R3-CV (Tenn. Ct. App. Dec. 18, 2008).
The opinion stresses the importance of complying with the locality rule, which is codified at Tennessee Code Annotated section 29-26-115.
Here's the link to the opinion:
http://www.tsc.state.tn.us/OPINIONS/TCA/PDF/084/Geesling%20v%20Livingston%20OPN.pdf