Targus iNotebook for iPad
Despite its appearance, Targus' iNotebook ($180) isn't actually a case for the iPad. Packed inside the surprisingly elegant fabric and leather folio is a notebook with a sensor above it, used to wirelessly transmit your traditional pen-based writing and drawings to your tablet. This is accomplished through a free app available in the App Store, and by using the included special Bluetooth pen. Targus states that you don't have to use special paper; iNotebook will work with any A5 or 8" x 5" paper. The sensor and pen are both charged with an included dual-head Mini-USB cable, and you also get two replacement pen tips; the pen cap doubles as a stylus.