You didn’t even have to open up your notebook computer Wednesday to hear the alarms and klaxons going off in the technology blogosphere: Someone had leaked images and video of a dual-screen, multi-touch tablet PC that’s supposedly in the “late prototype” stages at Microsoft. Gizmodo is the lucky recipient of the information regarding the Courier, said to be an actual device that looks more like a slim e-reader or portfolio than a tablet computer. The two 7-inch screens face each other book-style, and users can interact with them with a stylus or with their fingers.