What is XMii & Who could be correct to be in here?

HI All,

Could anyone let me know what is xMII and who are rt professionals to be in this technology. The main reason of asking this question is , i came to know that person should be a functional guy to start working in XMII. Is this true?

I want to learn xmii, kindly let me know where can i start from and what are the needed skillsets for start

Thanks,

Raags