Ah, "Superman: Strange Attractors." One of the first three trade paperbacks I ever bought (t was a three-for-two deal at Books-A-Million), and I picked it simply because the names "Gail Simone" and "John Byrne" were on the cover. Loved it, loved the villains, loved the cute Lois/Clark moments (flying around the world for coffee and rolls for your wife? That's dedication).
I recall that Polaris said Aura was "nearly" dead, so I assumed she got better. And some of the Ravers showed up for a panel to help in Bludhaven during Infinite Crisis, though I don't remember if Aura was featured. Still, I would assume she's alive until told otherwise.
Here's hoping for a Ravers Reunion in Adventure Comics.