Ok, so I skimmed the messages on the board so forgive me if any of this has already been said.
I was in a workshop with the casting director of WSS and he spoke for about an hour about exciting things they would be doing with WSS.
First, he raved about Matt Cavenaugh as Tony, so they really want him. Evidenced here:
http://www.playbill.com/news/article/120393.html He also said he wanted all the ethnic roles to be played by people of the proper ethnicity and people who can speak spanish fluently and with perfect accent.
He told us that Sondheim is collaborating with Lin Manuel Miranda to rewrite lyrics of certain songs into Spanish so that when the Sharks would be singing, it would mostly be spanish, except for Anita, who loves english, so her part will be in english.
Thats about all I remember. I also remember hearing (not from him) that Lea Michele will definitely not be asked to take the role of Maria.