Alias would be good-- you could all get together Sunday night to watch this female CIA agent kick some serious butt!
Sex and the City too--those women are as tight and sisterly as any I've ever known!
Ever After-- not a girly bonding movie, but SUCH a girly movie.
Miss Congeliality--shows how they all overcome their competitiveness to become friends.
Practical Magic, Witches of Eastwick would be fun.
That's all I can think of off top of my head-- but check out this book--
Cinematherapy : The Girl's Guide to Movies for Every Mood
http://www.amazon.com/exec/obidos/AS...777934-9501734
Amy