There was a company looking at doing that but they went out of business a year ago due to lack of product and demand (lots of IP though!)

I presume you want the full spectrum of frequencies to transit the wireless spectrum versus a single channel audio and video only, if you want the full spectrum you are still SOL unfortunatley.

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Currently 2010 X6 35i, Premium, Technology, Sport.
2004 Lotus Esprit - Final Edition
Former '04 X5 4.4i, Highland Green, Nav, DSP, PDC, Heated FR & R Seats, Comfort Seats, Rear Load Floor, Premium & Sport Package, IceLink Plus, Bel RX65, Tow Hitch, Sirius Satellite Radio.
Former '03 X5 3.0, Nav, Premium, Rear climate. (Stolen)
Former '01 X5 3.0, Nav, Premium, Rear Climate (Lemoned)