Their Sensing Dice is an active RFID tag with varieties of sensing capabilities. It’s about the size of a postage stamp and it can have temperature, acceralation, light, or infrared sensing capability, and functions as a sensor network node.
They are also developing the Responding Dice, which can respond to a query from a base station by lighting its LED.
Their new RFID development kit includes a mobile PDA reader device (Ubiquitous Communicator) and 100 sample tags. It’s difficult to buy only 100 tags so it’s great news if you wanted to start a small/experimental RFID project. There’s an English version as well. It will be released in January and will cost about 200,000 Japanese Yen (less than 2K USD.)