I thought the reason we have been wating for MMS is due to overload on the AT&T network? See below
http://finance.yahoo.com/news/Garmin-nuviR-1690-and-prnews-2948270328.html?x=0&.v=1
http://finance.yahoo.com/news/Garmin-nuviR-1690-and-prnews-2948270328.html?x=0&.v=1