Not the same problem but this solution sounds like it might work for me as well. My WIN7 vm recently estranged itself from the wireless card in my Macbook pro. Problem arose right around the time of installing OSx 10.8.2, which also seems to have caused a possibly related problem in OSx itself - it can't let go of the keychain link to my old wireless router and it can't learn the new one - I have to join it and type in the password every time.
I'll try deleting and adding back the network adapter to fix the WIN7 vm problem - any suggestions for the OSx keychain?