They are restricted legally by DOMA, but DOMA will not last. It can't. Whether it goes down by the Court this year or goes down by federal legislation, the tide has already turned that a majority wants at the very least equal federal benefits for same sex couples. Within the next 5 years, I predict we will see DOMA gone, if not sooner. The state laws may last longer, depending on how the SCOTUS rules on Prop 8, but I see them gone within a decade or two.