I am keeping track, and will keep track throughout the waiting period for the facts of life reunion show/movie. I'll keep you posted from now, Fall 2000 to Spring 2001, when the show/movie airs.
Anyways, here is what I dug up so far, some of it may be true, and some of it may not be true:
FACTS OF LIFE REUNION CASTING CALL


ACTOR NAME CHARACTER NAME
Charlotte Rae Mrs. Edna Garrett
Robert Mandan Bruce ??????
Lisa Whelchel Blair Warner
??????? ?????? Dorothy (Tootie) Ramsay
Mindy Cohn Natalie Green
Nancy McKeon Jo Polniaczeck ?????
????? ????? Jo's Husband
Cloris Leachman Beverly Ann Stickle
Julie Piekaraski Sue Ann Weaver
Julie Anne Haddock Cindy Webster
Molly Ringwald (Questionable) Molly Parker
Felice Schauter Nancy