Esther Cepeda has a good analysis of the appellate court ruling on SB 1070, particularly how it does not clearly articulate the proper relationship between federal and state governments with regard to the foreign policy issue of immigration. I really like her conclusion, and I agree completely:
Observers of Arizona's audacious law had hoped its judicial spectacle would at least prod the federal government into some action. But based on this decision, it seems that at least for the foreseeable future Washington's message to Arizona and other states who want to take immigration matters into their own hands is: You're not allowed to deal with illegal immigration yourselves, only we can. And we will. Sometime. Maybe. Stand by.