Looking great.
I think the planet could use some more (though subtle) detail variation, or maybe a subtle change in large scale variation. The actual surface detail is a bit too regular. The dust storms look really good.
I'll go either way on the asteroids, though if they are to stay, I think they'd look better with some cratering - but we all know that is a job.
Keep it up man! I've still got your coriolis image up on my work desktop. Everyone thinks its a space shuttle photo,