I will give a look to the user manual of your camera. I have a G15 which actually supports EyeFi cards. But i just can see if it's connected or not (and to which SSID) enable and disable it. And which pictures have already been uploaded. I am not able to list the configured networks.
Remember that with cameras like yours (and mine) which support Eyefi it's better to disable the card while forcing ther Wlan on with the CHDK menu. This in order to eliminate interference between Canon's firmware and CHDK while talking to the card.