then there are moral absolutes. There is something which is objectively good and something which is objectively not good regardless of how we, as human beings in a changing society perceive and interpret them.
If in the eyes of that god, nose-picking is evil and casual sex is good, then regardless of the social trends here in western society, nose-picking is evil and casual sex is good.
If there is no god, then likely, morality has developed as a means of mankind's living together in society. Over time, rules and law develop which observation shows will help the society live in better harmony. If we don't kill each other indiscriminately, take one another's stuff and do our neighbour's SO, we get along better. There is peace in the land. We hurt ourselves and each other less.
On the face of it, that would seem relative to the society. But some moral tenets have transcended time and society and are cross-cultural. Not murdering, stealing, sexin' up some other chicks' hubby, ...those seem to be in place no matter where you go. Those are the biggies, the relative absolutes, for want of a better term.
Personally, I believe that Atheists and Atheism can demonstrate just as much a sense of morality and perspective and can Theists. And Theists are just as susceptible to moral bankruptcy as is anyone else.
A good many Theists use the notion of moral absolutes to beat up on other people. Assuming the god in question is the one we've come to know in Christianity, I believe even god sees relative levels of morality. It's one thing to say that there is an absolute right and wrong, it's another to say that god holds us to those rights and wrongs in an absolute and non-negotiable fashion.
(Here is a link to a Mark Twain story that illustrates my meaning:
http://www.classicreader.com/read.php/sid.6/bookid.263/ - In this story the aunts are moral absolutists with regard to behaviour, not with regard to existential philosophies of good and evil.)
Stealing is stealing, -true. But an omiscient being would likely know the difference between a batty old woman with a purse full of pilfered condiment packages and a gang of theives that swindle the hardworking, aged and ill out of their life savings (such as Enron and Ken Lay). Whether we as Theists believe there is an absolute right and wrong, good and evil is a different matter from how we interpret each and every instance of behaviour.
It's difficult to separate ourselves from the social mores that we've learnt. We perceive to the level of knowing that slavery is reprehensible. I'm not sure we can objectively look back on our society ages past and say that in that society, it was acceptable without our more current needs to judge slavery wrong getting in the way. Theoretically, I believe it's possible. Some great many things held immoral in the past are not now and vice versa.