I am trying to enable Afterburner on two of my wl500-gPs.  All the documentation I can find uses the old method of nvram variables to enable it.  This does not seem to work with Kamikaze, I have also tried modifying the boardflags with no success.  This router should be able to do Afterburner out of the box, but for some reason I just cannot get it to work.

root@OpenWrt:~# wl cap
ap sta wet led wme pio 802.11d 802.11h rm cqa afterburner

root@OpenWrt:~# wl afterburner
0

root@OpenWrt:~# wlc afterburner 1
Command 'set afterburner' failed: -1

root@OpenWrt:~# wl gmode help
gmode   Set the 54g Mode (LegacyB|Auto||GOnly|BDeferred|Performance|LRS)

root@OpenWrt:~# wl gmode
54g Auto (1)

Does anyone have this working, or know how I should approach this next? 

Here is some system information that may or may not be useful:
Firmware               OpenWrt Kamikaze - With X-Wrt Extensions 7.09
Kernel          Linux 2.4.34 #18 Sat Jan 26 14:18:59 CST 2008
Device         ASUS WL-500g Premium
Board         Broadcom BCM4704 chip rev 9

Web mgt. console          Webif²
Version        r3868

I share the same problem. Is anybody willing to help?

Try to enable the afterburner before the wireless card inits... Or try

ifconfig wl0 down
wl afterburner 1
ifconfig wl0 up

I have the following results after ifconfig wl0 down
root@OpenWrt:~# wl afterburner 1
wl: Unsupported

root@OpenWrt:~# wlc afterburner 1
Command 'set afterburner' failed: -1

Kamikaze 7.09
wl - 4.80.53.0-1
wlc - 4.80.53.0-1