No surprise, of course, that the Kindle Fire HDX was the thing Amazon really wanted to shout about from the Seattle mountaintops today. But Jeff Bezos had another little surprise up his impeccably tailored sleeves -- a surprise that makes the $229 HDX look downright extravagant. A warm (if decidedly overcast) Pacific Northwest welcome to the new Fire HD. Well, "new" is perhaps not entirely accurate. This Kindle shares a lot with its predecessor, though there are some notable changes. N