Once the WLAN framework is stable, I'd be happy to do further beta . . .
As mentioned earlier, due to the fact that a lot of wifi hardware is closed source, getting wifi working under linux is often a matter of trial and error to find a working driver and/or firmware.
The above being said, yours is the first case I've seen where wifi is disabled in software on boot.
Wifi works in tc-5.x for me and others with broadcom hardware and I believe it will work for you once we find the right method.
Given that you reported earlier that the wifi extension displayed several wireless access points, you cannot be that far from success.
I suggest you make an extension of the cut firmware and try the following:
* remove any "blacklist" boot codes
* remove any firmware/wireless extensions from "onboot"
* reboot
* load the firmware extension
* load the wireless-KERNEL extension
* load the rfkill and wifi extensions
* unblock the wifi software switch with rfkill
* run the wifi.sh script
..and let us know how you get on.