An ongoing lawsuit against Cisco claims that caste discrimination is a form of national origin discrimination. Cisco's attempts to throw out the lawsuit on the grounds that caste discrimination isn't illegal were unsuccessful. There's a good shot that a judge will rule that caste discrimination is covered by national origin discrimination.
I'm optimistic but that could also open the door to many more lawsuits where someone felt prejudiced because of what side of town they grew up on or what state they are from.
