Anyone got any insight into getting decent (USA) internet service in various places across the USA? Air card or what? I know in some towns/cities you could get a signal at McDonalds or other wifi spot, but other than that, what's available. I might go on an extended trip, thousands of miles, and I cannot live without daily internet for my day job work. I can get email on iPhone, but I need to login to several industry databases on a regular basis to do work-related research. I have a laptop, but open to buying whatever is needed. Thanks!