There are very few details available at this point, but late last week at the 46th Shizuoka Hobby Show 2007 here in Japan, JR was showing a prototype of their new humanoid robot named the "Sperior-BR7".
We do know that the kit will be light - approximately 1.07 kg, and stands 30 cm. tall. The robot features from 14 to 21 degrees of freedom using the RBS582 servos controlled by a LPC2148 cpu. The RBS582 is the successor for the RBS581 servo with the same general size, speed and torque but with a case and mounting that lends itself to custom robot designs.
Although the company hasn't released any firm release or production plans, there is a new website devoted to the robot kit.