I'm against it. Don't take this as me having any problem whatsoever with people being any sexuality under the sun. Whats wrong with gays doing what they're already doing? If this isnt broken why do we need to fix it? This idea is only tossed into the ring by people similar to those on Triple J's HACK segment... full of self entitlement.
Its also like a guilty vote. Eg if you don't vote for it (similar to voting against the Disability Scheme), you're old fashioned or homophobic, rather than allowing it / disallowing it on its merits alone.
It is broken. Full of self entitlement - damn right, the entitlement to marry just like straight people.