Mobile Devices has a story about a new, white nook now on sale at Barnes and Nobles. It’s only $150, but only has Wi-Fi, but the 3G version is now only $200, which is $60 off the original price. The only differences between the $150 Wi-Fi nook and the $200 3G nook are: Wi-Fi vs 3G, the Wi-Fi has a white back, the 3G has a gray back and the Wi-Fi is 11.6 ounces while the nook 3G is 12.1 ounces. The $200 Nook may be worth it just to make sure you have perpetual, free access from anywhere, but regardless this is good news for ebook readers.