Win in 10th Circuit
A District Court in Oklahoma struck down its law allowing employees to have firearms in locked cars on company lots -- grounds were that OSHA's general duty to keep a workplace safe overrode the State law. The 10th Circuit just reversed the ruling and upheld the State law.
I can't find the opinion on the 10th Circuit website, will link as soon as I can.
UPDATE: Joe Huffman found it, in pdf, here.