We've blogged on the Maryland vs Wal-Mart situation before (the Old Line State had passed a law which would have requored specific employers -- namely, Wal-Mart -- to provide health coverage to its employees there). This would have placed an onerous financial burden on Wal-Mart's customers, and perhaps led to lay-offs or even stores closing.
Fortunately, the US Fourth Circuit Court of Appeals saw what a boondoggle this would have created (not to mention that it conflicted with ERISA, which supercedes state law), and told Maryland legislators to take a hike.
All's well that ends well...