We knew it was coming, but not how soon, and we'd only guessed at a price. Today a tipster sent over this screenshot, however, clearly showing a Nook WiFi on Wednesday for $149. While internal databases aren't the most reliable source for release dates even assuming the screenshot is legit, we'll know for sure in just days. The question now is how Kobo stacks up.WiFi-only Nook surfaces in Barnes and Noble database, costs