Wireless networking

Can any help me with getting wireless working with laptop.
There is a lot written on this topic and i have read most of it, but understand a very little.
I have followed instructions for determining if the wireless card is recognized which i think is below?

 *-network:1
                description: Wireless interface
                product: AR5005G 802.11abg NIC
                vendor: Atheros Communications, Inc.
                physical id: 2
                bus info: pci@06:02.0
                logical name: wifi0
                version: 01
                serial: 00:16:ce:8a:89:c9
                width: 32 bits
                clock: 33MHz
                capabilities: bus_master cap_list logical ethernet physical wireless
                configuration: broadcast=yes driver=ath_pci driverversion=0.9.4.5 (0.9.3.1) latency=168 maxlatency=28 mingnt=10 multicast=yes wireless=IEEE 802.11g

But also ran
sudo iwconfig

lo no wireless extensions.

eth0 no wireless extensions.

wifi0 no wireless extensions.

ath0 IEEE 802.11g ESSID:"" Nickname:""
          Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
          Bit Rate:0 kb/s Tx-Power:9 dBm Sensitivity=0/3
          Retry:off RTS thr:off Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/94 Signal level=-94 dBm Noise level=-94 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Hope this helps solving the problem as i am completely out if my depth.
Thanks