The Plen is one of the few humanoid robots to come out of IREX that I had not previously heard of. Unfortunately I have not been able to dig up much information on it yet either. What I have learned is that is being developed by Systec Akazawa, a Japanese aircraft parts maker. It has built-in Bluetooth that allows it to be controlled by a cellphone or pda as well as a computer. The Plen will go on sale in March of 2006 and cost approximately $2100 USD.