I would love to see Notre Dame join the Big Ten.
First, they already play about four Big Ten teams per year.
Second, I hate how the Big Ten's schedule works. The teams don't all play each other, and there's no conference championship game. I find it absurd.
Adding another team, especially an important program would be great for college football. The Big Ten would end up with 12 teams, and be forced to play a championship game.
Even with two divisions, the Big Ten could still keep it's top rivalries like the SEC does. Every year UF plays LSU, Georgia plays Auburn, UT plays Alabama...
Having a top team be independent just throws more ambiguity to the largely subjective BCS. Notre Dame would have to adjust some of it's other games, but it wouldn't ruin anything. The games against the service academies are antiquated. I realize ND is doing those schools a favor, but it's time to move on.
The reality is that there's very little chance of this happening, especially with ND having their lucrative TV deal with NBC. I just think this would be a great thing for college football.