In only states that have gay marriage, or everywhere?
DOMA was repealed; http://www.glaad.org/marriage/doma#what-is-doma
Basically, you could work for the federal government, in a state like Massachusetts, say, and despite the fact that your state recognized your marriage, you would not be able to use your federal government benefits, such as health insurance, for your spouse.
Here's a Plain English take on Hollingsworth v. Perry, the challenge to the constitutionality of California's Proposition 8, which bans same-sex marriage: After the two same-sex couples filed their challenge to Proposition 8 in federal court in California, the California government officials who would normally have defended the law in court, declined to do so. So the proponents of Proposition 8 stepped in to defend the law, and the California Supreme Court (in response to a request by the lower court) ruled that they could do so under state law. But today the Supreme Court held that the proponents do not have the legal right to defend the law in court. As a result, it held, the decision by the U.S. Court of Appeals for the Ninth Circuit, the intermediate appellate court, has no legal force, and it sent the case back to that court with instructions for it to dismiss the case.
There will be much further discussion and analysis about how the decision in Perry affects other couples in California. For the time being, we will say this: the Supreme Court has dismissed the appeal challenging a final order from the trial court. It would appear, then, that the order will go into effect. And it appears that this final order purports to prohibit the Attorney General and the Governor from enforcing Prop. 8.
There could well be new challenges to the scope of that order. But for the time being, the order appears to be in effect and to prevent enforcement of Proposition 8 statewide.
I saw it was 5-4, I don't know for sure who voted which way, but I can assume Kennedy was the deciding vote since that's usually how he rolls.
So glad it went this way, keeping my fingers crossed the Prop. 8 ruling goes this well, too.