Sold in separate polyurethane ($39) and dyed aniline leather ($69) versions, Apple's new iPad Smart Cover is a typically minimalist protective solution from the Cupertino company: What's novel here is Smart Cover's attachment to the iPad 2, which relies upon magnets now inside the device to bolt seamlessly onto one of the tablet's sides, and the iPad 2's ability to be automatically locked or unlocked when the Smart Cover is sensed in a closed or open…