This Kindle DX arrived via US Mail just a few minutes ago, so I thought I'd share my first impressions.
The box it came is was identical in size to the box the 2nd generation Kindle came it. Zip it open down the side to find an inner box wrapped in Amazon's black alphabetic paper. Zip that open to find a stiff cardboard box that could easily be mistaken for a take-out casserole dish. Lift the lid to reveal a HUGE version of the Kindle 2. The keyboard on the lower edge was squashed to make room for the screen. Number keys have been combined into the letters. The DX is incredibly thin, and weighs in at 1 lb 2.9 oz, or 538 grams. compare that to the Kindle 2's weight of 10.2 oz or 289 grams. The only external difference around the edges appears to be speaker perforations on the bottom edge.
These last two pictures reveal what's under the DX in the box. You get a good looking beginners guide and a USB cable which includes it's own AC charging adapter.
No turning it on yet. This DX is for my wife, who's main plans for it is to subscribe to a few newspapers. She hopes the added size and resolution make it more enjoyable than reading them on the earlier Kindles.