/\Some good information. Nothing too exciting, because it's all speculative or planning info, which means either years of planning, or nothing will come out of it. But at least there is talk.
Regarding the lots west of the US Airways Center. This hopefully only includes the empty block still occupied by the barrister building. That other block just to the south still houses those old buildings (a hotel and the white stuccoed old building) on Madison. Those guys are desperately in need of TLC, or they're going to be razed quicker than a speculator can put pen to paper.
I read the "Images of America - Downtown Phoenix" book last night, which had quite a bit of interesting information in it. The white stuccoed building (seen below) was built in 1909 in a Victorian brick style. With a little facade rehab and some renovations, it would be an AMAZING building... one of the very few remaining in downtown Phoenix, and a true asset to the city. Of course, this means nothing and it will likely be destroyed. But, it has to be saved. Buildings like that are a dime a dozen in many cities, but here not many are left.
You can see the tall arched windows and the brick work "cornice" or "lip" on the top of the building. Imagine if it were brought back to being brick and renovated... it would be awesome!
It would make some awesome lofts if renovated, or, I can imagine a startup or some architectural design firm occupying the building. From the side you can see the brick work as it is only painted white. The front has the layer of stucco.
The hotel is decent too... albeit not quite as old as 1909... but the best thing is look how far back on the lot it goes.
EDIT: Looks like the owner of these lots is "Suns Legacy Properties". Maybe that's good (or bad?).