This proposal has been floating around the web and on Skyscraper City, but I have yet to post it here. This is the site plan:
They are planning on reusing the frame of the operation center, because it was built with enough strength to withstand armored truck deliveries. The development group, Milhaus, has a relatively new blog that I have added to my links.
I hope they can get started on this project soon. That block is so bleak at this point that any sign of progress would be welcomed. Hopefully, another project could come in some day to fill in that last surface parking lot.