Engadget has an interview with Patrick Brady, Google's Director of Android Partner Engineering. In it, Brady says that the Nexus 7 tablet project actually took just four months from inception to launch. Google and Asus started with a prototype tablet that Asus previewed at the Consumer Electronics Show last January (that model was scheduled to sell for $250.) Development began in late February. The tablet was made thinner and lighter than the prototype, and some features were dropped to lower the cost, including a rear-facing camera. (Brady didn't confirm that the camera was dropped because of cost, but the January Asus prototype had one.) Brady said that the Nexus 7 is just the "first device" in the Nexus tablet range.