Did your wifi stay connected?WiFi continuous scanning problem appears to be with WPA authentication. On my router I was using WPA TKIP and a 63 character passphrase. Copying the phrase into the wireless settings wouldn't allow my N1 to connect. I didn't have this problem with EPE54B. I noticed when inputting a shorter phrase, the wifi would actually attempt to connect. I changed the password to something shorter and now the wifi is appearing to stay connected (20 Minutes so far with no drop).
So after you change your wpa key to be shorter, do you see any other networks?
I still see no networks.