Display network name in xmobar
You probably want the Wireless plugin which comes with xmobar
http://projects.haskell.org/xmobar/#wireless-interface-args-refreshrate
In your config file, you'd have something like this in the commands
list:
Run Wireless "wlan0" [ "-t", "<essid>" ] 10
If your interface is named wlan0
Then you can add this line
Run Wireless "wlan0" [ "-t", "<essid>" ] 10
to your commands list.
Access it in the template string through %wlan0wi%