I like this long blog post by Aaron Powell, who argues for the superiority of a secular morality without the religious notion of sin.
Feel free to sin away, as long as you do no secular harm!
By contrast, I'm less enamoured with the views of Dr Muhammad Abdul Bari, the leader of the Muslim Council of Britain, as expressed in this interview. This man is the public face of Islam in the UK, and he's still young enough to occupy that position for a long time, so let's hope for some genuinely liberal Muslim responses to his views.
Dr Bari thinks homosexuality and premarital sex are sinful, believes that Salman Rushdie's The Satanic Verses should have been pulped, encourages the UK government to ban drinking in public places, and doesn't want his daughter to wear a bikini (though at least he doess't want her in a burka). People should not show enough of their bodies to make others feel tempted, he says. He doesn't approve of stoning for adultery and suggests that this ancient Muslim requirement be read metaphorically - but he hedges somewhat, making the point that it won't be possible in practice to find four witnesses.
I don't know how old Dr Bari's daughter is ... but assuming she's old enough, I hope she's off drinking Champagne on a sunny beach somewhere, dressed in a topless string bikini, while discussing the finer points of Salman Rushdie's novels with her lesbian lover.