Hey Stephen, outstanding stuff there :-)
Some of the smallest clouds are a little bit too rough I would think, but that's a minor thing. Your planet configuration should be the optimal starting point for professional animations from orbit to ground level -wow!
@Chypyr: it's easy to get rid of the tiny islands if your highest shader provides a suitable mask for the continents and subsequent detail. Key to that is as far as I remember a negative value for fractal noise, with which the fractal shapes become much more simple. Once you have that mask, you can add more detailed displacements there - no islands :-)
You can see how that's done from the free Planets Pack that I made available on my site, however, Stephen's planet is way more mature than mine, as it holds up even for shots at ground level. Not to speak of the sophisticated clouds he has (I find these hard to make from an orbital view... never quite got them coming out nicely myself)
Cheers,
Frank
