Seriously, though, it's a good start. You might not have enough vertices to get a proper head-spine effect; perhaps they could be a separate parented prop.

From what I've seen of the Yuuzhan Vong, you could also widen and lower the mouth (less space between it and the chin), make the nose flatter, and work on the ears a bit more (they should be lobeless and pointed).

This should look very interesting, textured.

Look here for a good selection of reference images.