You can already . The empeg guys did a nice demo in Amersfoort of a wireless LAN connection to their demo car - they have a Apple AirPort hub sitting in the back of the car on top of their Subwoofer (there are pictures somewhere) and a cable running from that forward to the empeg. The AirPort hub runs on 12V DC anyway, which makes it all pretty easy really . There are plenty of other posts here on the subject if you are keen on doing it yourself.

(list 6284, Mk1 S/N 00299 4GB blue [for sale]. Mk2 S/N 080000094 6GB blue)
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(list 6284, Mk1 S/N 00299 4GB blue [sold]. Mk2 S/N 080000094 20GB blue)