Back in the early '90s, a certain Mr. Vandross and Ms. Jackson serenaded us with a little ditty on the benefits of free goods. Well, it might be time they updated the track because the best things in this eReading life are no longer free over a carrier's 3G. If you happened to grow accustomed to sucking down data on your AT&T- or Sprint-enabled Kindle keyboard, we'd advise you to hold off on that newly introduc
