The Cathedral of St. John as started a waterproofing project and put up scaffolding all around the nest. While the work will be away from the nest, it is close by. The timing of this project couldn't be worse, with egg laying in mid-March and hatching in April. It will be interesting to watch this situation develop. I'm afraid that the hawks might end up attaching workers if they get too close to an active nest later in the Spring.
James O'Brien has more photographs of the St. John's scaffolding, as well as news of similar repairs on Riverside Church on his blog.
I've also gotten news of the 888 Seventh Avenue nest from Brett Odom, who has a view of the nest from his office.
"I just wanted to let you know that while I have not witnessed any copulation activities between Junior and Charlotte. I can confirm that they have greatly increased their visits to the 888 7th Ave. nest site. Until the last several days I could go weeks between sightings, but recently I have seen them visit the nest several times a day."