Amazon Upgrades the Kindle DX, Concedes Defeat to Apple?

It's a big news week for Amazon: They've announced an update to the big-screen Kindle DX e-reader in a week or so, with an improved e-ink display and lower price. Way lower--down $110 to $379. Is this Amazon's first response to iPad?

The new Kindle DX will come with a graphite body, partly to make it stand apart from earlier incarnations of the device and partly to demonstrate Amazon does take some elements of style seriously (and, we also wonder, partly because a dark gray enclosure may make...