Hi!

Same thing happening to me:

>lshal

udi = '/org/freedesktop/Hal/devices/pci_8086_4222'
  info.linux.driver = 'iwl3945'  (string)
  info.parent = '/org/freedesktop/Hal/devices/pci_8086_27d0'  (string)
  info.product = 'PRO/Wireless 3945ABG Network Connection'  (string)
  info.subsystem = 'pci'  (string)
  info.udi = '/org/freedesktop/Hal/devices/pci_8086_4222'  (string)
  info.vendor = 'Intel Corporation'  (string)
  linux.hotplug_type = 2  (0x2)  (int)
  linux.subsystem = 'pci'  (string)
  linux.sysfs_path = '/sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0'  (string)
  pci.device_class = 2  (0x2)  (int)
  pci.device_protocol = 0  (0x0)  (int)
  pci.device_subclass = 128  (0x80)  (int)
  pci.linux.sysfs_path = '/sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0'  (string)
  pci.product = 'PRO/Wireless 3945ABG Network Connection'  (string)
  pci.product_id = 16930  (0x4222)  (int)
  pci.subsys_product = 'PRO/Wireless 3945ABG Network Connection'  (string)
  pci.subsys_product_id = 4096  (0x1000)  (int)
  pci.subsys_vendor = 'Intel Corporation'  (string)
  pci.subsys_vendor_id = 32902  (0x8086)  (int)
  pci.vendor = 'Intel Corporation'  (string)
  pci.vendor_id = 32902  (0x8086)  (int)

>lspci

02:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)

> dmesg | grep iwl
[   43.692435] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, 1.2.0
[   43.692443] iwl3945: Copyright(c) 2003-2007 Intel Corporation
[   43.692684] iwl3945: Detected Intel PRO/Wireless 3945ABG Network Connection
[   47.498383] iwl3945: Tunable channels: 11 802.11bg, 13 802.11a channels
[   47.499146] wmaster0: Selected rate control algorithm 'iwl-3945-rs'

> iwlist scan
lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wmaster0  Interface doesn't support scanning.

wlan0     No scan results


> modinfo iwl3945
filename:       /lib/modules/2.6.24-19-generic/ubuntu/wireless/iwlwifi/iwlwifi/compatible/iwl3945.ko
license:        GPL
author:         Copyright(c) 2003-2007 Intel Corporation
version:        1.2.0
description:    Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux
srcversion:     8E95C617988943846696F97
alias:          pci:v00008086d00004227sv*sd*bc*sc*i*
alias:          pci:v00008086d00004222sv*sd*bc*sc*i*
depends:        iwlwifi_mac80211
vermagic:       2.6.24-19-generic SMP mod_unload 586 
parm:           antenna:select antenna (1=Main, 2=Aux, default 0 [both]) (int)
parm:           disable:manually disable the radio (default 0 [radio on]) (int)
parm:           hwcrypto:using hardware crypto engine (default 0 [software]) (int)
parm:           debug:debug output mask (int)
parm:           disable_hw_scan:disable hardware scanning (default 0) (int)
parm:           queues_num:number of hw queues. (int)
parm:           qos_enable:enable all QoS functionality (int)


The nm-applet does not show any AP, and there's 7 around here...

I'm newbee in Linux and read all things here. But I don't know how to fix this.

If I ask for connect to another wireless net (left click over nm-applet as it shows no option under wireless network), I can type a valid one and use it fine.

My configuration:
Ubuntu Hardy
kernel 2.6.24-19-generic