I am a christian with little to no opinion on homosexuality. I've never critically read the passages referring to it, so I don't have enough to base an opinion on I guess.
But all this "homosexual people are evil" "at least I'm not one of them fags" "I'm better than you and I know better than you" mentality is so much bullshit. If you're a christian and condemning people for sexual immorality, your double standards for people and unlovingness is not what God wants from you. Be opposed to it, if you will, but do it in a loving and not a judgemental way. It's not up to you to decide who can have a relationship with God.
Also, people are allowed to live in 'de facto' relationships in australia, which isn't following sex-inside-marriage rules, so isn't it a bit of a contradiction that one sort of union is allowed and another is not? Marriage is not an excusively christian thing, neither.
re: higher up on this page: there are plenty of straight couples who don't do that great a job of parenting, but they're usually allowed to keep and mess up their kids. Argument is invalid.