Amazon is now offering the Kindle 3G, originally $190, for $164 with “offers.” This new version integrates 3G wireless alongside Wi-Fi, something the new Nook pointedly does not have. This new version will also include offers aka advertisements, allowing you to see a bit of flimflammery with your regularly scheduled ebook.
The Kindle Wi-Fi with offers costs $114, twenty dollars less than the Wi-Fi Nook. Both are available now.