Saw alot of people worrying about this on their status updates as well.
This is my understanding ..
If you have the Big Ten Network, you WILL be able to watch all Nebraska games this year, and any BTN game for that matter.
The BTN utilizes their 'alternate' channels to broadcast games that aren't on their main network. You may or may not see the 'alternate' channels right now, but they will be there on Saturday and you will be able to watch the game. This isn't like ABC regional coverage where you end up blacked out to games. EVERY game is open and free to watch if it is scheduled to be shown on the BTN.
Again, that is granted you are subscribed to watch the BTN on whatever cable/satellite provider you have.
So no worries for anyone, no matter where you live. If you get the Big Ten Network, you will be able to watch it.