The Supreme Court just posted its Notice of Forthcoming Filing for tomorrow, which says that it will be issuing its decision in Pioneer Electronics, Inc. v. Superior Court, no. S133794. This is the case involving pre-certification communications with putative class members.
My lengthy post summarizing the December 5th oral argument is here. A follow-up post with another take on the argument is here. The Court of Appeal's opinion is Pioneer Electronics (USA), Inc. v. Superior Court (Olmstead), 128 Cal.App.4th 246, 249 (2005) (Second Appellate District, Division Four). And finally, when the Supreme Court posts its opinion tomorrow morning at 10:00 a.m., it should be accessible at this link.