Gizmodo has posted a video (see below) demonstrating the user interface of Microsoft's rumored tablet project, Courier. The site said that the video is an internal Microsoft demo that was produced by a third party company working with Microsoft, the same company that produced other videos leaked to Gizmodo on the Courier project.
The user interrace being demonstrated in the video is merely a particular instance of one of the concepts Big Redmond is supposedly working on for the device, which is itself possibly aiming for the same space that Apple is targeting for its own rumored handheld tablet project.
In this version, Courier is designed around the "Infinite Journal," which is used to write in, manage agendas, view and manage contacts, develop (and present) a presentation, browse the Web, and browse files, all with finger gestures and the use of the "Courier Pen," a stylus.
As Gizmodo pointed out, there is no keyboard - virtual or physical - present in the demo, and all input is done with the above-mentioned Pen and finger gestures.
Courier User Interface from Gizmodo on Vimeo.