wconfig is a little tool written in Python that allows you scan for local wireless networks, automaticaly connect to first 
working network.

Licensed under GNU/GPLv3 license.

Requirements: Linux(or other Unix-like OS compatibile with WICD), python, wicd

webnull@webnull-gentoo-desktop ~/Praca/python/wconfig $ ./wconfig.py --help
wconfig for GNU/Linux, a wireless scanner with option to connect automaticaly to wireless, provide also XML output
Usage: wconfig [long GNU option] [option]

 --xml, -x - output results as XML to be easy to parse
 --auto-connect, -a - output results as XML to be easy to parse
 --debug, -g - enable extra debugging
 --disconnect, -d - disconnect from network if connected
 --connect-by-mac, -m - connect to wireless network by mac adress
 --connect-by-name, -e - connect to wireless network name (essid)
 --help, -h this screen

Examples:
 wconfig -s # scan for wireless networks and show results as plaintext
 wconfig -xs # scan for wireless networks and show results as parsable XML
 wconfig -d # disconnect from wireless network
 wconfig -ds # disconnect from wireless network and scan for network
 wconfig -m 00:00:00:00:00:00 # connect to wireless network by MAC adress
 wconfig -e my-network # connect to wireless network by bssid (network name)
 wconfig -i 0 # connect to first network from list, to list networks type wconfig -s
 wconfig -as # connect to first working network

It also supports XML output, so you can easily parse wconfig's output.

Example of XML output:
webnull@webnull-gentoo-desktop ~/Praca/python/wconfig $ ./wconfig.py -xs
<?xml version="1.0" encoding="UTF-8"?>
<networks>
   <network>
        <mac>00:00:00:00:00:00</mac>
        <name>webnull-home-network</name>
        <encryption>WPA2</encryption>
        <percentage_strength>75</percentage_strength>
        <mode>Master</mode>
        <channel>7</channel>
        <active>True</active>
   </network>
   <network>
        <mac>00:00:00:00:00:00</mac>
        <name>Pentagram P 6331-42 Domek</name>
        <encryption>WPA2</encryption>
        <percentage_strength>32</percentage_strength>
        <mode>Master</mode>
        <channel>1</channel>
        <active>False</active>
   </network>
   <network>
        <mac>00:00:00:00:00:00</mac>
        <name>linksys</name>
        <encryption>WPA2</encryption>
        <percentage_strength>26</percentage_strength>
        <mode>Master</mode>
        <channel>11</channel>
        <active>False</active>
   </network>
</networks>

Example of plaintext output:
webnull@webnull-gentoo-desktop ~/Praca/python/wconfig $ ./wconfig.py -s
0 01:02:03:04:05:06 "webnull-home-network" WPA2 75% Master 7 *ACTIVE*
1 07:08:09:10:11:12 "Pentagram P 6331-42 Domek" WPA2 32% Master 1 
2 13:14:15:16:17:18 "linksys" WPA2 26% Master 11

Changelog:
29.07.2011 (v.1.0):
    + Added changelog and versioning informations