Whew, this was a tough one to model. Basically had to start over again when I started adding the textures. While I learned a lot about SketchUp in the process, I don't think I want to do another building this detailed. Makes my head hurt just thinking about it.
I've uploaded this model to Google's 3D Warehouse, but the Mac version of SketchUp still has a bug where it loses the textures, so if you grab it it will be naked.
Oh, and btw, while I tried to size everything as accurately as I could, using floorplans and such, I had to make lots of guesses where I didn't have info. But, interestingly, after I finished, the building turned out to be almost exactly 680 ft tall.
This view is similar to one of their promo renderings:
From South Congress:
From Riverside (that's the Spring way off to the left):
From across Town Lake:
View from the top: