I will be driving cross-country USA in April (Philadelphia to San Francisco) and was wondering what would be my best bet for Internet access. I won't bring a laptop computer. I just want to do a quick check of e-mail every other day or so.

From previous trips to the US I remember that there are few Internet cafes such as you'd find in many other countries. And most of this trip will be in rural areas, so I am wondering where to find Internet access.

Thanks in advance.