Just to show that I can listen to and appreciate a good quip even if I disagree with the sentiment, here are my favorite atheist (or "agnosticish") quotes from Quotes of the Day.
Just in terms of allocation of time resources, religion is not very efficient. There's a lot more I could be doing on a Sunday morning. Bill Gates
Operationally, God is beginning to resemble not a ruler but the last fading smile of a cosmic Cheshire cat. Sir Julian Huxley
I have too much respect for the idea of God to make it responsible for such an absurd world.
I'm the world's least happy atheist. I miss having religious faith, but trying to have it seems like trying to be in love with someone that you're not in love with.
I don't know if God exists, but it would be better for His reputation if He didn't.
We are all atheists about most of the gods that societies have ever believed in. Some of us just go one god further.
If it turns out that there is a God, I don't think that he's evil. But the worst that you can say about him is that basically he's an underachiever.
ADDED BY danielg:
The impossibility of conceiving that this grand and wondrous universe with our conscious selves arose through chance seems to me the chief argument for the existence of God.”
[S]cience has itself become a kind of religion.
The fact that a belief has a good moral effect upon a man is no evidence whatsoever in favor of its truth.
I'm not contending in a dogmatic way that there is not a God. What I'm contending is that we don't know that there is.
I don't like the word "absolute." I don't think there is anything absolute whatever. The moral law, for example, is always changing. At one period in the development of the human race, almost everybody thought cannibalism was a duty.