The VA has not yet accepted same-sex marriage as it relates to VA disability benefits. The Supreme Court decision that stuck down DOMA, did not address the law in Title 38 of the U.S. Code that defines marriage for VA purposes. Title 38 specifically defines marriage as being between a man and a woman. DOMA provided a definition for marriage that agencies had to follow as most individual agencies didn't have their own statutory definitions. Since the VA has it's own law defining marriage, DOMA didn't change anything with the VA.
I'm anything but a legal scholar, but my understanding is that before the VA law could change, either legislation would need to be passed changing the law (won't happen - see GOP) or the law would have to be challenged in the courts. A court challenge would surely be a lengthy process.
OR.....
the administration could choose to not enforce this law since it would be near impossible to defend based on the DOMA decision.
Today's announcement by the VA:
MESSAGE FROM THE CHIEF OF STAFF
As you know, on June 26, 2013, the Supreme Court ruled that Section 3 of the Defense of Marriage Act (DOMA) is unconstitutional. While this decision was of great significance to many Veterans, VA was nonetheless required to follow statutes in United States Code Title 38 defining "spouse" and "surviving spouse" as persons of the opposite sex.
Yesterday afternoon we received word that the President has accepted the Attorney General’s recommendation that the Executive Branch of government cease enforcement of the definitions of “spouse” and “surviving spouse” in Title 38 to the extent that they limit Veterans’ benefits to couples of the opposite sex....
Jose D. Riojas
Sorry, no link. It is from my inbox. Expect more details in the near future.