GoW: Chains of Olympus delayed until Q1 2008 [Update]
No reason was given for the delay, but if they need more time to polish up Kratos' newest adventure -- it's worth waiting a couple more months. Plus we get a demo in September to keep us happy anyway, so it won't be an entirely Spartan-free Christmas.
[Update: Ready at Dawn responds: "I'm not really sure where this is coming from since we have not announced a date for God of War: Chains of Olympus for the North American marketplace yet. So I would say this falls into the rumor and speculation category."]