Seems like 500 Alton is back, just at 24 floors. Crescent heights being the developer.
If we recall, the original development was 50 floors.
We have an older thread in the canceled archives for it:
http://forum.skyscraperpage.com/showthread.php?t=210316
Unfortunately, the cockroaches ruined that idea with their inane height limits and fear of change. Something will rise at that site, but nowhere near the 50 floor proposal that was nixed.