Of course, there are already at least two groups preparing class action lawsuits against it, so it's most likely going before the courts, where one can only assume common sense will prevail and it will be struck down.
Especially because a similarly worded act was recently struck down in Vermont. Basically, the (Supreme, I think) court said that Vermont had the right to restrict marriages to only be between a man and a woman, but in order to prevent discrimination, they had to provide a similar option for same sex relationships. Thus, Vermont now provides for some sort of civil union partnership thingy.
And now, I've written way beyond my quota for the day, so I'm going to bed. G'Night. ;-)