Well, is there a certain aspect of MMA she is more interested in? Kickboxing, Boxing, Jiu-Jitsu, Wrestling, Judo...ect.
She could always start with one of those, if she wants to dive right in there are MMA gyms around that teach many styles.
I think one of the best things to do would probably be to go to the gyms and ask to talk to some instructors, or even just contact them through their info on their websites.
"You have a big word for a guy who don't have a gi right now." - Renato Laranja