In order to be able to surf the internet while you're driving, there are several ways to do this:
1. You get a pcmcia card that acts as a wireless modem. You would need to sign up with a provider such as Sprint or Earthlink to get access. This setup is quite expensive, as the card alone costs anywhere from 150 upwards to almost 500$, and the access fees can go upwards to $100 a month.
2. Using your cell phone as a modem. If you have a cell phone that can be hooked up to a computer, then you're cell phone can act as a modem for your computer. However, you will be charged your normal phone rate.
IMHO, it's not worth it to go surfing the net on the road. Its just too expensive.
When on the road, I usually just use it for watching DVDs or playing games, or organizing my photos.
As far as buying a laptop, there are several choices to go to, but I would recommend getting one with a DVD/CD-RW drive. Much nicer because you can burn CDs with it. The newer laptops will have Windows XP on it, so try to get a laptop with as much memory as you can, preferably 512mb or 256mb at least.
Try getting a 30mb or bigger harddrive, and try getting a laptop that has wireless built in. As far as brands go, my preference from top to bottom:
1. Toshiba
2. Dell
3. Sony
4. Compaq
5. Micron
Hope that helps
