The California Supreme Court has just issued its opinion in Iskanian v. CLS Transportation Los Angeles, LLC (June 23, 2014). In a nutshell, here's the scorecard:

The question is whether a state's refusal to enforce such a waiver on grounds of public policy or unconscionability is preempted by the FAA. We conclude that it is and that our holding to the contrary in Gentry v. Superior Court (2007) 42 Cal.4th 443 (Gentry) has been abrogated by recent United States Supreme Court precedent.
[W]e conclude that an arbitration agreement requiring an employee as a condition of employment to give up the right to bring representative PAGA actions in any forum is contrary to public policy. In addition, we conclude that the FAA's goal of promoting arbitration as a means of private dispute resolution does not preclude our Legislature from deputizing employees to prosecute Labor Code violations on the state‘s behalf. Therefore, the FAA does not preempt a state law that prohibits waiver of PAGA representative actions in an employment contract.

Slip op., at 1-2. Tough day to be opposed to the FAA's all-consuming rights grab. But the PAGA ruling is a small salve.