Here are the 278 businesses who filed a friend-of-the-court brief against DOMA today

This is different from the dozens of companies which have signed a brief in support of the lawsuit to invalidate California's Prop 8, which outlawed marriage equality in the Golden State.
     DOMA, signed by President Clinton in 1996, dictates that the federal government not recognize as married those same sex couples who are, in the increasing number of states that permit it.

     The brief says:

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"DOMA forces [the businesses] to administer dual systems of benefits and payroll, and imposes on them the cost of the workarounds necessary to protect married colleagues," the Los Angeles Times reported.
      The report said in those states that allow gay marriage, companies must treat employees with same-sex spouses as single for federal tax withholding and benefits, and many employers keep two sets of books — one for state and one for federal purposes.
      In the DOMA case, only section 3 of the act is challenged. Section 3 says, "In determining the meaning of any act of Congress, or of any ruling, regulation, or interpretation of the various administrative bureaus and agencies of the United States, the word 'marriage' means only a legal union between one man and one woman as husband and wife, and the word 'spouse' refers only to a person of the opposite sex who is a husband or a wife."

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     If you just want to see the companies which signed, visit GLAD, here.
     Casino goers: AmeriStar joined the signatories on the brief, but Caeser's, (which owns Harrah's) evidently isn't bothered enough by the federal government's refusal to recognize marriage equality to sign the brief.

   Us v Windsor Employer Amicus Brief by   aksarbent