Let the hive mind of Engadget get that for you.
"As someone who doesn't reside in the USA, I was wondering what would be the best way to get internet for my computer in the US for a couple of weeks? If it were Europe I know I'd look for some prepaid data. Is there anything similar offered by American carriers? A MiFi or a data SIM that I can tether from would work, but I'm trying to maintain a tight budget. Help!"
There is a difference between all cars having GPS and WHO GETS ACCESS TO THAT GPS INFORMATION!!
The GPS is not really what they object to its the WHO GETS ACCESS TO IT that they should have a problem with,