P.S. And from Beck & Herrmann comes word that the new bill includes a change welcome to class action defendants:
Ysbrand v. DaimlerChrysler Corp., 81 P.3d 618 (Okla. 2003) ... is the leading (and nearly only) case in the country to adopt "principal place of business" as a choice of law principle in class action cases. The Ysbrand ruling has made Oklahoma a magnet for all sorts of multi-state class actions that couldn't be certified anywhere else due to manageability problems created by the applicability of multiple state laws.
Apparently that will be changing soon, as the new law limits the extent to which claims by non-state residents can be folded into Oklahoma class actions.