Mine has also arrived this morning as well and I've had a quick read of the destructions.
Now I assume you are all going to run a cat5/6 cable to connect it to your broadband router to avoid being added to TB's cull list.
I won't have time to directly play with the settings until tomorrow or Sunday.
Power up the unit and you should be able to discover the default wifi settings using your Windows wifi connection tool. The default SSID is "TDC-9864". connect to this.
If you are allowing the broadband router to automatically allocate IP addresses to your PC / Laptop etc, this means you are running in DHCP mode and the device will automatically be allocated a local IP address.
Open your browser and type the address
http://192.168.10.1 and a login screen should be displayed. The default account name and password are both "admin".
A web page should be displayed, select router.
Go to the wireless section and setup the SSID, channel mode (default: automatic, personally I would set this manually and if your default broadband router is set to 3 for 2.4GHz select a minimum of three channels difference and ideally at least six and for the 5GHz which is probably set on your broadband router at 40, select either channels 44 or 48), security type (if not default: WPA/WPA2) and create a password which you have written down and will keep in a safe place! Click "reply" and the router will apply the changes and reboot.
VERY IMPORTANT: Log back onto the router with your new wifi SSID and password and then to avoid a second TB cull list addition by logging back in using "admin" and "admin", select the "advanced settings" menu write down on the same piece of paper as your wifi password a new admin login password and on the change password page set the new password.
Thats it all done.
Now the fun of routing your network cable to where you are going to place the router.