Governor Jack Markell (D) signed the bill into law a few hours later. It goes into effect on July 1, 2013, so Delaware will actually leap frog Rhode Island as the 10th state where same-sex couples can get married in the United States.
And then this happened during the debate:
BREAKING: Delaware Sen. Karen Peterson comes out as gay during marriage debate #lgbt
— Victory Fund (@VictoryFund) May 7, 2013