Arizona's controversial immigration law has finally made it to the United States Supreme Court.  The case is Arizona v. United States, No. 11-182.  SCOTUSblog has the petition here.

Note that this is only Arizona's request that the Court take up the case, not a decision by the Court to actually accept it.  However, I think the petition has a much better than average chance of being granted.  (Average being ~1%.)