How does the extinction of one make any difference? The giraffe may have more opportunity to survive if one of its preditors goes extinct, or if one of its competitors for food goes extinct, but that goes absolutely nowhere in still explaining how he got his long neck.

I'm sorry, John, but that is beginning to sound like wilful ignorance. Darwin's theory certainly provide an explanation for it. It may well be an explanation you disagree with, and there are alternative views on whether it was feeding pressure or sexual pressure that was the main selecting factor (for example), and there may be things that you believe Darwin's theory cannot explain, but claiming that the three requirements he identified - variation in individuals, differential rates of offspring and inherited traits (which we now identify as genetic inheritance) - are not able to explain how a giraffe got his a long neck just weakens your case. Indeed, since I understand ID draws heavily on the claim of 'irreducable complexity' I wonder what you see as irreducably complex in the case of the giraffe's neck?