So there are a lot of questions about how the URA handled the bidding for the PTC parcel, Parcel 3, that Walnut wants to use for residential. The issue as I understand it is that the URA had been marketing it as two parcels plus a garage for industrial/commercial use, and Walnut is instead going to do one residential project with integrated parking, and the question is whether other possible developers knew that was possible and were given an opportunity to bid before the URA entered into exclusive negotiations with Walnut, and at the original price when the parcel was more restricted in use. Personally, I don't really care what price the URA sells stuff at, but I do care they make these opportunities open to any qualified developer, and fairly consider competing bids.
But anyway, in looking into that a bit, I saw that there was an amended RFP for the PTC as of 2-18:
http://apps.pittsburghpa.gov/ura-files/UPDATED_Draft_Final_2-18-15.pdf
And it includes a note that the status of Parcel 8a is "Proposal Received/Under Review". Parcel 8a is farther east along Second, across from Bates:
I don't think there has been announcement about that (although my memory may be failing me), but it would represent another big step forward for the site if it gets developed.