Japanese YPR Ubiquitous Networking Laboratory announced a PDA like device called the Ubiquitous Communicator.

The Gadget features a smart tag reader, IP telephony and a 2MP digital camera. It has WLAN and Bluetooth connectivity. SD Card and Mini-SD Card slots are present in the device. It can playback MPEG vidoes.
It runs on a 32bit RISC CPU. The Ubiquitous Communicator measures 144x76x15mm and weighs 196g. Several thousand of the devices are in a field test in Japan. The price of the Ubiquitous Communicator is 300,000yen.
More details in this pdf document (japanese).

The YRP Ubiquitous Networking Laboratory has also developed the RFID Reader Wrist Watch. Another device that runs the T-Engine OS is the T-Cube a orange size PC.