this is the officially released GPL source code by Asus, used for compiling firmware version 1.2.3.4
you can find it here for downloading:
http://www.asus.com.tw/pub/ASUS/wire...DD/GPL1234.zip
http://www.asus.com/pub/ASUS/wireles...DD/GPL1234.zip
http://www.asuscom.de/pub/ASUS/wirel...DD/GPL1234.zip
http://www.asus.com.cn/pub/ASUS/wire...DD/GPL1234.zip
mirrored @ chupa.nl:
http://files.wl500g.info/asus/wlhdd/gpl/GPL1234.zip
tipped by Martin1802