007 - I'm not attempting to start world war III with you here. As I said before, perhaps for some reason your region is simply not ordering them with the rear air suspension. However, if you do a little research you'll discover that other regions are in fact still allowing this option. The factory itself is absolutely not prohibiting the rear air suspension option, nor is that option unavailable in general.
My region is the southeast. If you use an Atlanta zip code for example on toyota.com you'll be able to go in and see (1) that the rear air suspension option is most definitely still allowed, and (2) the current "en route" inventory for this region. If you select the 2007 V8 4x4 LTD models, you will see that there are 2 currently in the queue for this area which have the rear air suspension. One will arrive 10/21 and the other will arrive 11/01. About 10 others have come and gone with the rear air suspension since the 2007 models started arriving.
In addition, I ordered mine in September and received an order confirmation just this week, and it does in fact have the rear air suspension.
Again, no war intended. I'm just relaying the facts as I have them here.