For you,
PFLAG is an absolutely amazing resource. They will help you support your friend in the best way you can, and give you resources to help her.
For her, there are a thousand organizations for GLBT folks.
Pridelinks is one of my favorites, a megasite of links to many GLBT resources on the web. Also,
LesbiaNation is a great resource for Lesbians.
I'm bi, and a flame dame, I'm active in the GLBT community here where I live and on the 'net. You're already supporting her in the best way possible, by accepting her as who she is with no reservations. That first "coming out" experience can make or break a young gay person trying to find their way in the world. Even if her later attempts to come out to family/friends aren't all that great, she always has her first experience, which will carry her through.