The company has announced casting for the first week of its upcoming all-Balanchine program (4T's, Prodigal Son, and Symphony in C)

http://www.pnb.org/season/all-balanchine-casting.html

And casting is up for second week as well, same link.

They announced last night (at the post-show chat) that Le Yin was out of the program -- he needs knee surgery) and that Lucien Postlewaite would cover his performances, which is what the website shows now.