http://www.gsmdome.com/htc/htc-one-s-units-with-damaged-cases-will-be-replaced_30564
this is worth a read. this same sort of thing happened to HTC...
I won't be in a black model long enough to keep my fingers crossed for this POSSIBLE, albeit highly unlikely, response from Apple. Furthermore, I wouldn't keep the black and hope that Apple comes to the rescue, but if you are willing to live with it, then go for it.
More likely response: free bumpers!
EDIT:
Also, the only way this gets the HTC-type response is if the Scuff Gate gains some traction with the tech blogs. Too early to tell - as the thing hasn't even been released. Funny when things come back into perspective.