A few comments regarding Christianity, the Bible, and homosexuality.
1) The only record we have that records the teachings of Christ whatosever is the Bible. Every major branch/sect/denomination (whatever you want to call it) of Christianity has accepted that the Bible is the final authority on spiritual matters. That has always been the official teaching. Sure, some have then done/taught things that hypocritically went against that main belief, but that is and historically always has been the only meaning defining aspect of the Christian faith. For that reason alone anyone who denies that the Bible is the final authority on spiritual matters, or who tries to pick and choose what they believe of it, has no right to call themselves Christians lest they dilute the word into having even less meaning than it already does.
Calling oneself a Christian doesn't make one a Christian any more than my calling myself Italian would make me an Italian. Either you are or you aren't, and the Bible makes it clear that a true follower of Christ (a true Christian) will strive to submit to and obey Jesus' teachings. ALL OF THEM. That's the whole point. If you think you can pick and choose you're making yourself your lord, not Jesus.
2) As for a previous poster's comments regarding language being an issue so far as the Bible's addressing of homosexuality, I received A grades in Koine Greek (the language the new testament was written in), and can assure you that the meaning in key passages of scripture are very clear. It's true they didn't have an exact single word "homosexual", but when the language says "if a man has sex with another man", I'm pretty certain what it means.
3) Homosexuality is universally condemned in the Bible every time it is mentioned, not just in the so-called "barbaric" old testament laws (that's an insulting and culturally arrogant way to refer to it but another issue altogether). Jesus himself defined marriage as intended by God as being between one man and one woman, and since the Bible is even MORE clear that sex is only to take place in a marriage relationship, that makes it pretty obvious homosexual sexual activity is a sin.
But the key passage that is in the New Testament which would states most clearly that it is a sin is Romans chapter 1, specifically verses 26-28.
My concluding thoughts: If you're not willing to acknowledge all of Jesus' teachings as laid out in the Scriptures, at least be honest enough to not call yourselves Christians. Call yourselves the Happy Funtime Love Group for all I care, but you're not a Christian if you don't listen to Jesus Christ, and as I said before the only source that we have for His teachings is in the thousands of ancient copies that we have of the biblical manuscripts. And since Jesus Himself referred to the Scriptures as the fully inspired, fully trustworthy Word of God, it's a take or leave it thing, not a pick and choose thing.