nice idea and all but i don't like the blending....... i mean from what i can see there was a render with a white(or some other color) background.. if you try to blend that in there is that big white spot that just doesn't belong there... try extracting the render from the background... or just ignore this if you have no idea what i'm talking about

PS: your text seems too greeny-whitey... try changing that to a darker green so it fits with the sig more