new Ubuntu install - no WiFI

I recently installed ubuntu 8.04 on a Dell Latitude D 600, model PP05L. I use a Linksys wireless G Broadband router, model WRT54G2 V1. The WiFi does not work on the Ubuntu installation, it is fine with the Windows XP installation. I followed some of the commands suggested in "WiFiDocs/WirelessTroubleShootingGuide/Commands". Here is a cut and paste of the result:

fmerker@fmerker-laptop:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11g ESSID:""
          Mode:Managed Channel:0 Access Point: Not-Associated
          Tx-Power=0 dBm
          Retry min limit:7 RTS thr:off Fragment thr=2346 B
          Link Quality:0 Signal level:0 Noise level:0
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

fmerker@fmerker-laptop:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:11:43:42:84:71 brd ff:ff:ff:ff:ff:ff
3: wmaster0: <BROADCAST,MULTICAST> mtu 1500 qdisc ieee80211 qlen 1000
    link/ieee802.11 00:0b:7d:14:60:30 brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ether 00:0b:7d:14:60:30 brd ff:ff:ff:ff:ff:ff
fmerker@fmerker-laptop:~$ lshw -C network
WARNING: you should run this program as super-user.
  *-network:0
       description: Ethernet interface
       product: NetXtreme BCM5705M Gigabit Ethernet
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 01
       serial: 00:11:43:42:84:71
       width: 64 bits
       clock: 66MHz
       capabilities: bus_master cap_list ethernet physical
       configuration: broadcast=yes driver=tg3 driverversion=3.86 firmware=5705-v3.16 latency=32 mingnt=64 module=tg3 multicast=yes
  *-network:1
       description: Network controller
       product: BCM4306 802.11b/g Wireless LAN Controller
       vendor: Broadcom Corporation
       physical id: 3
       bus info: pci@0000:02:03.0
       version: 03
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master
       configuration: driver=b43-pci-bridge latency=32 module=ssb
  *-network DISABLED
       description: Wireless interface
       physical id: 1
       logical name: wlan0
       serial: 00:0b:7d:14:60:30
       capabilities: ethernet physical wireless
       configuration: broadcast=yes multicast=yes wireless=IEEE 802.11g
fmerker@fmerker-laptop:~$

I think there is no driver for the WiFi but that is a guess on my part. Any help would be appreciated.

Thank you, Fred Merker