Does the 910 kit come with pocketwizards or any other slaves? If not pocketwizards should be your next purchase after this stuff. You'll find them along with the flashes being your most useful tools during skate shoots.
Off topic: Have you posted any of your skate photography?! I'd love to see it. I got into photography by photographing skaters.
Took some directly from facebook, so quality isnt perfect. There are some flaws on editing, composing, etc, but they are at least 1 year old, i've evolved a lot as a photographer since then haha