Interesting TMC thread (starting at post 99 on the link below) where "insiderinfo" posted a picture that appears to be a Computer-Aided Design model of the beta Model X. Shortly after posting the picture, TESLA contacted TMC and forced the Mods to remove the picture as "Proprietary Information". So it certainly looks legit, with the poster suspected to be from a 3rd party vendor working on a roof rack.
I did not get to see the picture before it was removed, but based on comments the following can be gleamed:
1) The nosecone is gone. RIP
2) The packs will remain 60 and 85kWh, but with cells with 20% better energy density, reducing weight. The poster claims that the reduction in weight is better for range than a larger pack (I am not so convinced by this).
3) There is a pano roof over the front seats!
4) It appears they will have a solution for the roof rack problem.http://www.teslamotorsclub.com/showthread.php/34067-Where-is-the-Model-X-Test-Mule-Is-there-one/page10