Sitecom 300N and Wi-Pi not recognized

[IriDium]

If this is a fresh install - then there is a lot of stuff going on in the background.

If it is still stuck, plug in the ethernet cable and ssh into your RPi.
#sudo xbian-config 2) --> 3

Select wlan -> and set the information there.

If your password has / / where the spaces are, then delete them. The password should be "as is".

BTW: My Wifi Dongle is drawing about 400ma.

More information can be found Here and Here