Heyo,
I know this is an old thread but it's exactly what I need.
I've just got myself an Asus eeepc 1011px and trying to get the Fn-F2 key to toggle wifi on/off.
Wifi is actually working after I enabled it in BIOS but I'd like to be able to switch it on and off (there is no physical wifi switch)
Using xev reports no key event at all for Fn-F2 (which I think means that there's no hope for that key combo) but I have a couple of other Fn-F keys that report
no symbol which I think means I could possibly map the wifi function to that key.
Any suggestions would be appreciated.

PCLinuxOS 2011 KDE 4.6.5 Kernel 2.6.38.3-pclos1.bfs Atheros AR9285 Wireless Network Adapter (PCI Express)