Looking for mhl/usb otg-hub that works simultaneously for z4 tablet.

Just bought a Z4 tablet, what a wonderful little machine I must say. I would want to use with my Xbo360-controllers and on a bigscreen-TV, so therefore I am in search of a mhl/usb otg-adaptor with possibilty to use mhl/usb otg function simultaneously. I guess this question applies to all 11-pin mhl equipped devices tough, right?
MHL3 equals 11 pin connector which can utilize both data transfer and streaming video out simultaneously or have I misunderstood the whole thing.? This is what gathered after reading up on it a bit on the web at least.

Best regards!

/Dave