Are There Transsexuals here who have successfully married?

[The Conquistador]

But the issue of gay marriage is not a federal matter; it is strictly a state matter and dependent on which states would ratify such legislation and how accepting the people are.

And I quote 10th amendment: The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.

Unfortunately the Constitution does not mention anything about marriage so it will be entirely left up to the residents of whatever state gay marriage is proposed in.

However, I see it becoming more widely accepted sooner if it was brought before SCOTUS. In a legal view, marriage is nothing more than a binding contract between two consenting adults. If it is ruled as such, any legislation prohibiting is would be unlawful. This is one of those issues where it is a matter not of "If", but of "When".