What petition did your employer file? Do you have a green card or are you a citizen? Did you guys marry in the states or outside? How long have you been married?
I'm going to assume that you guys were married in the US and you filed for an AoS for your wife... in which case - you will have a two year interview after your interview date which you *both* must show up to. You must file a form (I-751 I believe) stating that you are still married and that you are still living together, etc.. etc.. this means that your wifes GC (assuming she has or gets it) will be a temporary GC (conditional) until that time period is over. One year beyond that, she could file for citizenship (assuming you are a citizen).
I'm not too sure about this next bit, but if you are not a citizen (sounds like you were sponsored by a company via H visa of some sort) rather a permanent resident and they are filing for her GC I don't really know how it works, but it may be a similar situation... in that you'd have to wait until she was approved before divorce. Then maybe she could keep her GC...
I'd be interested to see what others say on this forum... remember, always seek professional advice in these scenarios and what I say is not in any way legal advice. It's just an opinion on what I've gone through and what I've read as a laymen.