I can't offer much insight on the local dial-up/cell question, but I can warn you that cyber cafe on this side of the pond are years behind their counterparts in the UK and Europe. You should be able to find some decent fare on the west coast, but heaven help the man stranded without his laptop in the MidWest...in short: Plan to be as self sufficient as possible on your trip, and treat the few good cafes you'll find as an unexpected bonus...
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I can't offer much insight on the local dial-up/cell question, but I can warn you that cyber cafe on this side of the pond are years behind their counterparts in the UK and Europe. You should be able to find some decent fare on the west coast, but heaven help the man stranded without his laptop in the MidWest...in short: Plan to be as self sufficient as possible on your trip, and treat the few good cafes you'll find as an unexpected bonus...