So apparently, a federal judge appointed by George W. Bush ruled DOMA unconstitutional.
Document here: http://www.scribd.com/doc/101669398/Pederson
Best article right now is probably huff or TPM: http://tpmmuckraker.talkingpointsmemo.com/2012/07/bush_appointee_rules_doma_unconstitutional.php?ref=fpnewsfeed
It violates the Fifth Amendment and so on, and is obviously expected to be appealed.
Out of curiosity, could DOMA be sued under different provisions for military families trying to get benefits, or what? Is that a thing that will happen?