The Missouri Supreme Court just acknowledged that its 2010 decision, finding a class arbitration waiver was unenforceable under state law, is preempted by the FAA, pursuant to the rationale of Concepcion.  In Robinson v. Title Lenders, Inc., __ S.W.3d __, 2012 724669 (Mo. Mar. 6, 2012) and Brewer v. Mo. Title Loans, Inc.…