That lot on the corner was supposed to 688 Montgomery, this one
http://skyscraperpage.com/forum/show...ht=jersey+city. Almost definitely dead, especially since St Peters is actively building dorms at 762 Montgomery Street.
I'm not quite sure what the excavation in the foreground is for, however. There's a project proposed for the vacant building next to it (43 Jordan Ave), but the excavation seems to be on the 688 Montgomery property.