Sorry I couldn't reply as soon as this was posted, but I've been dealing with 'real life' (bees in the attic, reconstruction of bathroom, etc.).
Both were on display at the HobbyVisions show in Las Vegas. There is some sort of delay on the D glider model and I did not probe to find out if it was a glitch in manufacturing or a design tweak or if the container fell off the ship in the middle of the Pacific Ocean.
The SpaceShip One whould arrive in the next wave or the wave thereafter. It seems that items are arriving every 3 to 4 weeks. I said "seems" because I see what you see.
eMail the folks at eHobbies and ask them what they've heard. Then order them and get on the back order list which will make you get them shipped to you AS SOON as they arrive. If you wait, the exisitng orders will be filled first and if there are any left over they will then update the website to indicate "in stock".
-Fred Shecter NAR 20117