I picked mine up in mid-Oct in the LA area and used the link noted on this thread to find out my car had an open recall. I then called the dealer and they confirmed it was a Navigation update. Apparently people were unhappy that their 2013 vehicles arrived with 2012 maps and were balking at the $200+ fee to upgrade to the 2013 maps so BMW is installing the update for free. Have no independent verification of this - just what the service dept told me.
I was told it would take about 2-4 hours to upload/upgrade so I'm getting a loaner and having them check the fuel filler (which I have yet to get a full tank on one pump yet) as well. Will do it after the holidays.