Mine

ryan@RPCNotebook:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:A0:D1:9A:33:FD  
          inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::2a0:d1ff:fe9a:33fd/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
          RX packets:11518 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1054 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1055336 (1.0 MB)  TX bytes:77208 (75.3 KB)
          Interrupt:17 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

wlan0     Link encap:Ethernet  HWaddr 00:16:44:9D:5A:33  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:1444 errors:0 dropped:588 overruns:0 frame:0
          TX packets:4088 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:90665 (88.5 KB)  TX bytes:171696 (167.6 KB)

ryan@RPCNotebook:~$ sudo dhclient wlan0
[sudo] password for ryan:
Internet Systems Consortium DHCP Client V3.0.5
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/wlan0/00:16:44:9d:5a:33
Sending on   LPF/wlan0/00:16:44:9d:5a:33
Sending on   Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 11
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
ryan@RPCNotebook:~$ cat /etc/netowrk/interfaces
cat: /etc/netowrk/interfaces: No such file or directory
ryan@RPCNotebook:~$