For $499, http://entourageedge.com is releasing the dual-screen 9.7" e-reader with Wacom and 10.1" Android Tablet combo based on the Marvell PXA168 processor. It comes with 3G sim reader, memory expansion, USB host ports and plenty more. I filmed an interview and product demonstration with an Engineer of Entourage Systems at CES: http://armdevices.net/2010/01/17/entourage-edge-android-dual-mode-tablet-e-reader-at-ces-2010/
Once companies start getting the annotation, collaboration user interface aspects of the Android tablets and stylus touch e-reader functions right, this could unlock huge revolution in all areas where people need to collaborate on editing texts, potentially revolutionizing education, journalism, law, politics and more.
Here's a video-review posted by sync-blog.com: