[NU Sports] The protected rivalries ...

[Tom Maycock]

OK, I'll look it up for you. Here's one article that captures some of it nicely:

http://espn.go.com/blog/bigten/post/_/id/38101/nebraska-penn-state-revisit-shared-history

"The schools played each other every year from 1979-83, and both usually brought high rankings into the game. The series came to a head in 1982, when No. 8 Penn State hosted No. 2 Nebraska in what many Nittany Lions consider the greatest game ever played in Beaver Stadium. "

"Between 1970-99, Nebraska and Penn State finished in the top 10 of the AP poll together 17 times. "

They also played a home-and-home last decade. 

Basically, while you may not remember it as a great rivalry, all Nebraska and Penn State fans (those of a certain age at least) most certainly do. In this case, it's about quality, not quantity.

Tom