May I ask how you made the surface that the cubes are resting on? And also, how did you get such realistic lighting (reflections especially). I mean, it looks like there actually sitting on a kitchen counter.
Epic! There's a bit of anti-aliasing issues, especially in the reflections... Might I suggest rendering it a bit larger than you intend(I tend to do twice what I want the image size to be.) and then scaling it down? It usually helps.