I think the whole "let's give them something separate but equal" is bullpoop. We all know how well that worked out with African-Americans.
It's ridiculous to not allow a couple to marry because they have matching genitalia. And what's wrong with their being married in a church, Alcar? Haven't you been saying this whole time that the Bible has nothing against homosexuals? Christians can be gay too, afterall.
Hmm... polygamists... Well, not giving them the right to marry more than one person won't stop them from being with more than one, so sure, why not give them their rights too. Who would it harm? Would it somehow give some make the marriage of some couple across the country or even down the street impure?
Marriage Protection Act... give me a break.
EDIT: Is gay marriage banned in any other countries?