BMW's MY 2009 cars will get a new iDrive system with a 40GB hard drive. According to Bimmerfile, the drive allotment will have 12GB dedicated to navigational maps (and 8GB for entertainment and 10GB for your address book, because you've got more friends than music, apparently). With nav maps placed on the hard drive, BMW will no longer be providing a case full of map DVDs. The maps will have the entire US on them, or Europe if you pick up your car at BMW Welt. When things have moved on and it's time to get your maps updated, you'll take your car and your checkbook to a BMW dealer, and they'll install U.S. v2.0.

[Source: BMW Blog]