Hi CY!
Him, what I meant is this: we humans don't know the limits of everything - we can't! So the options are either agnosticism, or a decision of some sort or other.
It does not work to say 'I don't trust God.' I am writing somehting at the mo about the nature of trust and suspicion, and could talk you through my reasoning (but then I'd be accused of obfustication!
) - but basically, my bottom line is that you can't know anything of any sort without trust of some sort in something. Which is blatantly obvious, really.... 
Grimma - the onus on me is to prove God? Well that is a logical impossibility for you! 
Notfluffy - yes, the 'ooooh, aren't we atheists so sophisticated and witty and morally superior and courageous, and look at those poor benighted fools in their belef systems' is just deeply unattractive. I don't think it's just that Dawkins is pompous (although that is true), I think it's a strategy which is used to set up Christians to look like lesser people, and combined with the logically impossible questions that the Dawkins etc. camp puts to faith (with no intention of actually giving any real thought to) it is game, set and match to atheists -'oh, look at theose stupid Christian halfwits, they can't even answer a simple question like 'who made God' without going off on a great long ramble about eternity and transcendence - there's no reasoning with these people, you know...'
No, as far as I know no atheist has blown up a building in the name of scientific materialism - but as I said earlier, I don't think it's good logic to argue against the validity something by reference to the abuse of it.