The Billion 7800N arrived today, and it took no more than 5-10 minutes to set it up and configure it and be back connected to the 'net (most of that time was trying to find the PPPoE username/password in the setup menus).
It works great - I now get wireless everywhere I wanted to. In our bedroom, outside in the back yard, and in Jacob's room (not sure that last one is such a good idea
).
Seems a bit faster too. And one less device hooked up too, since I had a separate modem and router before.
Very happy.