Just received an offer from Dodge for a 2010 navigation map update. Letter stated that the disc was sent out to me a few weeks ago (never received) and that I'd have to call them with my credit card number for the activation code. Anyone else receive the same letter? Anyone take them up on the offer? For those who have, is there a difference with the updated maps? Seems like a lot of money for an update especially if there's little difference between the two maps. At least with my C6 GM gave me two free updates.