There is scheduling somewhere in there that you can use to power down the wireless to save energy so check to make sure that's not turned on.
EDIT: Found it

From the help
Wireless Access Point Control
* Always On- Selected by default, this setting enables the wireless radio, which allows the modem router to work as a wireless access point.
* Per Schedule Below (Use 24-hour clock) - You can specify when the Wireless Access Point is turned on and turned off by entering a start time in the Hour and Minute fields next to Turn on Wireless Access Point and an end time in the Hour and Minute fields next to Turn off Wireless Access Point.
* Always Off - Disables the wireless access point.
* Allow Broadcast Name (SSID) -Selected by default, the modem router broadcasts its SSID, allowing wireless stations that have a null (blank) SSID to adopt the correct SSID. If you disable broadcast of the SSID, only devices with the correct SSID can connect. This nullifies the wireless network discovery feature of some products such as Windows XP, but the data is still fully exposed to a determined snoop using specialized test equipment like wireless sniffers. For this reason NETGEAR recommends that you also enable wireless security.
* Wireless Isolation - This feature is disabled by default. If it is enabled, wireless stations cannot communicate with each other or with stations on the wired network.
If not then it could be what I get which I believe is a firmware bug as the wireless goes off randomly. And usually shortly afterwards the router locks solid and needs rebooting.
They are fantastic routers, but do seem a bit unstable. Though I've managed to cure the overheating problem by adding some heatsinks to the main processors and the wlan shield to dissipate a bit more heat. Now it doesn't lock up as often as it used to. Not for the faint hearted though as you will invalidate your warranty!
Edited by deleted (Wed 29-Jul-09 08:42:15)