Casio has its own tablet, and it's trying something different instead with its new Paper Write tablets. Hand written notes and tablets can live side by side in Casio's version.
Available in September, there will be four models to choose from. The specs are a 1.5GHz processor, just a gig of RAM and 16GB of storage. Bluetooth 4.0 and NFC/RFID support are notable additions. Though what makes the Paper Write Tablets are truly unique is their front facing camera which can digitize hand written notes, documents and business cards using the tablet's notepad-packing case.
If you're more comfortable with pen and paper, you can use a stylus directly on the tablet's touchscreen display for taking notes or navigating the UI. It'll be out in Japan. A worldwide release is unknown at this point. [Casio Paper Writer via Ubergizmo]