I've found that the LBM does indeed work after I disabled the existing proprietary drivers in System -> Hardware Drivers and leaving the ath5k drivers on (listed as "drivers for Atheros 5xxx"). I then restarted the computer and wireless was back on. That is what I did previously in prior kernels of Intrepid, except that time around the ath5k driver wasn't in the list, but disabling the regular Atheros drivers did the trick back then too.
I've found that the LBM does indeed work after I disabled the existing proprietary drivers in System -> Hardware Drivers and leaving the ath5k drivers on (listed as "drivers for Atheros 5xxx"). I then restarted the computer and wireless was back on. That is what I did previously in prior kernels of Intrepid, except that time around the ath5k driver wasn't in the list, but disabling the regular Atheros drivers did the trick back then too.