I have the intel 2200bg wirelss card and used the iwi-firmware .
Load modules at boot :
vi /boot/loader.conf
if_iwi_load=”YES”
wlan_load=”YES”
firmware_load=”YES”
legal.intel_iwi.license_ack=1
configure iwi network options :
vi /etc/rc.conf
ifconfig_iwi0=”WPA DHCP”
configure WPA settings :
vi /etc/wpa_supplicant.conf
ctrl_interface_group=0
network={
ssid=”ssid”
key_mgmt=WPA-PSK
psk=”shared-key”
}