I spoke to my source at the Broadhurst this evening and was able to attain some interesting information.
The entire company , according to the person I spoke to, is currently contracted through October 21st. While certain people have already chosen to leave at that time (Lea Salonga being the one singled out in our conversation,) those that have shown interest in staying are currently "being evaluated for renewal."
The rumors about people like Ann Harada and Mandy Bruno being replaced have come about because they are amongst the group the producers have chosen
not to renew. It's currently unclear if they will depart at the end of their contracts in October or if they're being let go prematurely (I wouldn't be suprised if the latter happened,) but I can confirm that both will indeed be replaced in the coming months.
In regards to the Rosie O'Donnell rumors-- my source says that while a deal for her to come in as Madame Thenardier through Christmas looked to be in the works last month, her recent firestorm of publicity and early exit from "The View" has caused her to end up deciding against joining the company, citing that she wants to take some time off before heading back to work (though she did end up signing on for an unspecified amount of appearances on the new season of "Nip/Tuck.")
Tonya Pinkins: Then we had a "Lot's Wife" last June that was my personal favorite. I'm still trying to get them to let me sing it at some performance where we get to sing an excerpt that's gone.
Tony Kushner: You can sing it at my funeral.