Aside from the fact that the Big Ten has not even hinted that they are looking to expand, I don't really understand why people think the Big 10 would be a good fit all. UConn is hoping to get into the ACC right now, if that doesn't happen its not like they can just say "oh well, lets just go to the Big Ten."
The Big Ten is more attractive and valuable than the ACC. If we are frozen out of the ACC, I think we're no higher than 5th on the list for Big Ten. Stadium is small and off campus. No AAU membership. I'd take a Big Ten invitation in a heartbeat.
I'm not buying the ND to ACC nonsense. The Big Ten is a better academic conference, and has all the natural rivals of ND, including several teams they already play annually. If they go to a conference, it's Big Ten. Also, everyone talks about NYC tv market, and the media folks consider it a Big Ten market. The B1g network is carried there as well.
Rutgers is in interesting shape. Teams are mediocre, but academics and AAU standing are strong. They could go either way. Missouri would kill for a B1g invite, and so would Kansas at this point. Missouri has good all around teams, and strong media centers. About the only advantage UConn has on these schools is a hockey team, which matters to the B1g and not the ACC.