If the plates were local (if she could catch the state), check any body shops for Hondas needing front end body work. Being that is's a Honda, it most likely carries significant damage from an accident like that. Go out crusing the local scene and see if you can find the car. Even if it's in a junkyard, the plates will yield the previous owner.
Glad to hear your wife is ok. I hope they find the bastard.