There should be wi-fi in cars, so you aren't bored out of your mind during those long car rides, amirite?

My dad actually has this thing called AT&T mobile hotspot MiFi and it does exactly that! We recently drove for 11 hours to Seattle and my whole family was able to use Wi-Fi in the car the whole way up! It works really great - you should consider getting it.

can't some cell phones use tethering?

I thought you meant for the drivers... haha. I was thinking, right... because we don't already have enough distraction

wi fi hotspots exist (not sure how, but they can work in cars). not to mention cell phones with data plans get get internet almost anywhere

Well, some radio stations can play some good music.

You could bring your router and modem with you, and plug them up in the car.