Hey this is cool. I LIKE Wiki. What's On Star? It's basically just a cell phone link to an operator who knows where you are by GPS.
Here's their blurb: http://www.onstar.com/
"You're Never Alone or Without Help OnStar is one of the most exciting innovations in automotive history.
It's a waste of money. Cell phones will be required by law to have built-in direction finding for 911 services. They'll use trianglation. But then GPS itself doesn't cost much.