I Hope She Doesn't Die

Here's mine:
http://twitter.com/little_edie
http://twitter.com/big_edie

Here's some others that I know of:
http://twitter.com/grey_gardens - "Quotes from the outtake audio of doc film, Grey Gardens: Little Edie [LE], Big Edie [BE], Albert [A], David [D]." Sara Maysles (daughter of Al Maysles) "tweets quotes from GG from the unreleased outtakes". Not frequently updated.

http://twitter.com/greygardensnews - "News and updates about Edith Bouvier Beale, her daughter Edie, and everything that touches Grey Gardens."