Well, looks like Jessilyn Gilreg (I'm prob butchering her name), the former foul-mouthed, sex-addict on Nip/Tuck who slept with Christian is coming to guest star on Heroes in a 3-4 part mini-arc.
Word has it that she will have "powers unlike any you've seen on the show so far". My speculation is that she'll be a firestarter / flamethrowing heroine from the rumors I've seen......
Peace
ElF