Microsoft might find it difficult to take over this domain as Sun Microsystems has patents here. For example:
6,754,183 System and method for integrating a vehicle subnetwork into a primary network
6,507,810 Integrated sub-network for a vehicle
6,370,449 Upgradable vehicle component architecture
6,362,730 System and method for collecting vehicle information
6,694,259 System and method for delivering parking information to motorists
6,636,801 Delivering location-dependent services to automobiles
6,253,122 Software upgradable dashboard
Slashdot Mirror
6,754,183 System and method for integrating a vehicle subnetwork into a primary network
6,507,810 Integrated sub-network for a vehicle
6,370,449 Upgradable vehicle component architecture
6,362,730 System and method for collecting vehicle information
6,694,259 System and method for delivering parking information to motorists
6,636,801 Delivering location-dependent services to automobiles
6,253,122 Software upgradable dashboard