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I suggest replacing the screens of the mobile devices to show mobile-optimized sites instead of home screens. Maybe even an animation of before and after to help visitors understand why they need your service. Many people won't want to go through the process of previewing their site and need instant examples.
Overall I love the design, but I am partial to blue. I would however suggest improving the contrast ratio for the white on blue text, as well as the two calls to action at the bottom which should stand out. Maybe use the bright blue for the bottom links.
