tim@SpacePod:~$ sudo /etc/init.d/networking restart
 * Reconfiguring network interfaces...                                          Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

wifi0: unknown hardware address type 801
wifi0: unknown hardware address type 801
Listening on LPF/ath0/00:16:e3:6b:85:d4
Sending on   LPF/ath0/00:16:e3:6b:85:d4
Sending on   Socket/fallback
wlan0: ERROR while getting interface flags: No such device
Error for wireless request "Set ESSID" (8B1A) :
    SET failed on device wlan0 ; No such device.
wpa_supplicant: cannot read contents of managed
run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

wifi0: unknown hardware address type 801
SIOCSIFADDR: No such device
wlan0: ERROR while getting interface flags: No such device
wlan0: ERROR while getting interface flags: No such device
wifi0: unknown hardware address type 801
Bind socket to interface: No such device
Failed to bring up wlan0.
Error for wireless request "Set Encode" (8B2A) :
    SET failed on device ath0 ; Invalid argument.
There is already a pid file /var/run/dhclient.ath0.pid with pid 134993416
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

wifi0: unknown hardware address type 801
wifi0: unknown hardware address type 801
Listening on LPF/ath0/00:16:e3:6b:85:d4
Sending on   LPF/ath0/00:16:e3:6b:85:d4
Sending on   Socket/fallback
DHCPDISCOVER on ath0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on ath0 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on ath0 to 255.255.255.255 port 67 interval 12
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
                                                                         [ OK ]