I don't know if this is a first, but I actually agree with a full article written by Michael Rosenberg. Today's Freep has a piece by him against Big 10 expansion. (Link: http://www.freep.com/article/20110922/COL22/109220460/Michael-Rosenberg-Big-Ten-better-off-only-12-teams.)
I too am basically against expansion. Every team we add is one more team to split the revenue pie stream with. I particularly don't care for expansion outside of the Big 10 footprint. Unless a school is in our geographic footprint, student demographic, and fits with our culture, I can't see adding more teams and ending up with a "super-conference."
The one clear exception is Notre Dame, but that horse has been beat to death. I'm trying to think of other major schools in our area who have a decent history, size, academics, etc., and not many come to mind. I suppose Iowa State might qualify in addition to ND.
What I wouldn't want to see happen is to add a directional state university MAC Snack, or a city commuter school (Pittsburgh, Cincinnati) and I'd want a team that has a strong football team. We went through this before (in adding Nebraska.) Honestly, Nebraska and Penn State are a bit far physically, but they do fit the Big 10 profile well.
However, to flirt with schools yet further away than Penn State and Nebraska makes absolutely no sense to me. The Pac 10, SEC, ACC, Big East, and others can do what they want. I think the Big 10 is a great conference as it is now constituted. Short of adding ND, and possibly Iowa State, it is lunacy to consider further expansion.