this should give you a basic ideal of what telematics services can provide.
this may be the only place where i think Sirius and xm both were wise to extend the length of their contracts with oems, but with that said i think five oems have the right to use sdars spectrum for their own efforts and im not sure it excludes the offering of any other similar content.
heres some of what i posted to another board.its worth reading thru when you have the time to check out the included links.
heres the link