As soon as a blockbuster decision hits the street, zealous litigators work to stretch it as far as it can go.   AT&T Mobility LLC v. Concepcion (April 27, 2011) is getting that elastic band treatment right now.  For example, AT&T Mobility (Concepcion) was the subject of a brief aside in Mission Viejo Emergency Medical Associates v. Beta Healthcare Group (July 25, 2007).  In a lawsuit between an insured and the insurer, a motion to compel arbitration of a dispute arising out of the policy was denied by the trial court.  The Court of Appeal reversed and remanded for further proceedings regarding a claim of unconscionability.  In the course of the discussion, the Court said:

We invited the parties to provide their comments on the recent United States Supreme Court case, AT&T Mobility LLC v. Concepcion (2011) __ U.S. __ [131 S.Ct. 1740] (AT&T). Defendants appear to argue that AT&T essentially preempts all California law relating to unconscionability. We disagree, as the case simply does not go that far. General state law doctrine pertaining to unconscionability is preserved unless it involves a defense that applies "only to arbitration or that derive[s] [its] meaning from the fact that an agreement to arbitrate is at issue." (Id. at p. __ [131 S.Ct. at p.1746].) This simply does not apply here.

Slip op., at 13, n. 4.  The Court then concluded that the asserted unconscionable provisions in the arbitration agreement could be dealt with by the trial court when it considered any motion to sever provisions:

The specific provisions that plaintiffs raise — regarding arbitration in San Francisco, the even split of the cost, and the nonarbitrability of discretionary decisions — can be the subject of a motion to sever before the trial court if the parties cannot reach agreement on the terms of arbitration. (Civ. Code, § 1670.5, subd. (a).) Although we may decide this issue as a matter of first impression (see Higgins v. Superior Court (2006) 140 Cal.App.4th 1238, 1251), given the relative lack of factual development as to these issues, we believe that deference to the trial court would better serve the ends of justice.

Slip op., at 15.

So there you have it from the Fourth Appellate District, Division Three: AT&T Mobility (Concepcion) doesn't preempt all California law on the subject of contractual unconscionability.  They didn't even break a sweat figuring that out.  Interestingly, this is the second decision (Brown v. Ralphs being the first) that asked for supplemental briefing on AT&T Mobility (Concepcion) but issued a decision that is relatively unaffected by it.